Linear Algebra Examples

$2 [\begin{array}{c} 1 & 2 & 3 & 4 \\ - 2 & - 3 & - 4 & - 5 \\ 0 & 3 & 2 & 1 \\ - 1 & 2 & - 2 & 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1

Simplify each term.

Tap for more steps...

Step 1.1

Multiply $2$ by each element of the matrix.

$[\begin{array}{c} 2 \cdot 1 & 2 \cdot 2 & 2 \cdot 3 & 2 \cdot 4 \\ 2 \cdot - 2 & 2 \cdot - 3 & 2 \cdot - 4 & 2 \cdot - 5 \\ 2 \cdot 0 & 2 \cdot 3 & 2 \cdot 2 & 2 \cdot 1 \\ 2 \cdot - 1 & 2 \cdot 2 & 2 \cdot - 2 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2

Simplify each element in the matrix.

Tap for more steps...

Step 1.2.1

Multiply $2$ by $1$ .

$[\begin{array}{c} 2 & 2 \cdot 2 & 2 \cdot 3 & 2 \cdot 4 \\ 2 \cdot - 2 & 2 \cdot - 3 & 2 \cdot - 4 & 2 \cdot - 5 \\ 2 \cdot 0 & 2 \cdot 3 & 2 \cdot 2 & 2 \cdot 1 \\ 2 \cdot - 1 & 2 \cdot 2 & 2 \cdot - 2 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2.2

Multiply $2$ by $2$ .

$[\begin{array}{c} 2 & 4 & 2 \cdot 3 & 2 \cdot 4 \\ 2 \cdot - 2 & 2 \cdot - 3 & 2 \cdot - 4 & 2 \cdot - 5 \\ 2 \cdot 0 & 2 \cdot 3 & 2 \cdot 2 & 2 \cdot 1 \\ 2 \cdot - 1 & 2 \cdot 2 & 2 \cdot - 2 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2.3

Multiply $2$ by $3$ .

$[\begin{array}{c} 2 & 4 & 6 & 2 \cdot 4 \\ 2 \cdot - 2 & 2 \cdot - 3 & 2 \cdot - 4 & 2 \cdot - 5 \\ 2 \cdot 0 & 2 \cdot 3 & 2 \cdot 2 & 2 \cdot 1 \\ 2 \cdot - 1 & 2 \cdot 2 & 2 \cdot - 2 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2.4

Multiply $2$ by $4$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ 2 \cdot - 2 & 2 \cdot - 3 & 2 \cdot - 4 & 2 \cdot - 5 \\ 2 \cdot 0 & 2 \cdot 3 & 2 \cdot 2 & 2 \cdot 1 \\ 2 \cdot - 1 & 2 \cdot 2 & 2 \cdot - 2 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2.5

Multiply $2$ by $- 2$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & 2 \cdot - 3 & 2 \cdot - 4 & 2 \cdot - 5 \\ 2 \cdot 0 & 2 \cdot 3 & 2 \cdot 2 & 2 \cdot 1 \\ 2 \cdot - 1 & 2 \cdot 2 & 2 \cdot - 2 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2.6

Multiply $2$ by $- 3$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & 2 \cdot - 4 & 2 \cdot - 5 \\ 2 \cdot 0 & 2 \cdot 3 & 2 \cdot 2 & 2 \cdot 1 \\ 2 \cdot - 1 & 2 \cdot 2 & 2 \cdot - 2 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2.7

Multiply $2$ by $- 4$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & 2 \cdot - 5 \\ 2 \cdot 0 & 2 \cdot 3 & 2 \cdot 2 & 2 \cdot 1 \\ 2 \cdot - 1 & 2 \cdot 2 & 2 \cdot - 2 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2.8

Multiply $2$ by $- 5$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 2 \cdot 0 & 2 \cdot 3 & 2 \cdot 2 & 2 \cdot 1 \\ 2 \cdot - 1 & 2 \cdot 2 & 2 \cdot - 2 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2.9

Multiply $2$ by $0$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 2 \cdot 3 & 2 \cdot 2 & 2 \cdot 1 \\ 2 \cdot - 1 & 2 \cdot 2 & 2 \cdot - 2 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2.10

Multiply $2$ by $3$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 2 \cdot 2 & 2 \cdot 1 \\ 2 \cdot - 1 & 2 \cdot 2 & 2 \cdot - 2 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2.11

Multiply $2$ by $2$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \cdot 1 \\ 2 \cdot - 1 & 2 \cdot 2 & 2 \cdot - 2 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2.12

Multiply $2$ by $1$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ 2 \cdot - 1 & 2 \cdot 2 & 2 \cdot - 2 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2.13

Multiply $2$ by $- 1$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 2 \cdot 2 & 2 \cdot - 2 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2.14

Multiply $2$ by $2$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & 2 \cdot - 2 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2.15

Multiply $2$ by $- 2$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 2 \cdot 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.2.16

Multiply $2$ by $0$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + 3 [\begin{array}{c} 5 & 7 & - 9 & 4 \\ 0 & 3 & 1 & - 1 \\ 4 & 6 & - 8 & 7 \\ 5 & 0 & 3 & 4 \end{array}]$

Step 1.3

Multiply $3$ by each element of the matrix.

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 3 \cdot 5 & 3 \cdot 7 & 3 \cdot - 9 & 3 \cdot 4 \\ 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 1 & 3 \cdot - 1 \\ 3 \cdot 4 & 3 \cdot 6 & 3 \cdot - 8 & 3 \cdot 7 \\ 3 \cdot 5 & 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 4 \end{array}]$

Step 1.4

Simplify each element in the matrix.

Tap for more steps...

Step 1.4.1

Multiply $3$ by $5$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 3 \cdot 7 & 3 \cdot - 9 & 3 \cdot 4 \\ 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 1 & 3 \cdot - 1 \\ 3 \cdot 4 & 3 \cdot 6 & 3 \cdot - 8 & 3 \cdot 7 \\ 3 \cdot 5 & 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 4 \end{array}]$

Step 1.4.2

Multiply $3$ by $7$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 21 & 3 \cdot - 9 & 3 \cdot 4 \\ 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 1 & 3 \cdot - 1 \\ 3 \cdot 4 & 3 \cdot 6 & 3 \cdot - 8 & 3 \cdot 7 \\ 3 \cdot 5 & 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 4 \end{array}]$

Step 1.4.3

Multiply $3$ by $- 9$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 21 & - 27 & 3 \cdot 4 \\ 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 1 & 3 \cdot - 1 \\ 3 \cdot 4 & 3 \cdot 6 & 3 \cdot - 8 & 3 \cdot 7 \\ 3 \cdot 5 & 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 4 \end{array}]$

Step 1.4.4

Multiply $3$ by $4$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 21 & - 27 & 12 \\ 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 1 & 3 \cdot - 1 \\ 3 \cdot 4 & 3 \cdot 6 & 3 \cdot - 8 & 3 \cdot 7 \\ 3 \cdot 5 & 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 4 \end{array}]$

Step 1.4.5

Multiply $3$ by $0$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 21 & - 27 & 12 \\ 0 & 3 \cdot 3 & 3 \cdot 1 & 3 \cdot - 1 \\ 3 \cdot 4 & 3 \cdot 6 & 3 \cdot - 8 & 3 \cdot 7 \\ 3 \cdot 5 & 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 4 \end{array}]$

Step 1.4.6

Multiply $3$ by $3$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 21 & - 27 & 12 \\ 0 & 9 & 3 \cdot 1 & 3 \cdot - 1 \\ 3 \cdot 4 & 3 \cdot 6 & 3 \cdot - 8 & 3 \cdot 7 \\ 3 \cdot 5 & 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 4 \end{array}]$

Step 1.4.7

Multiply $3$ by $1$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 21 & - 27 & 12 \\ 0 & 9 & 3 & 3 \cdot - 1 \\ 3 \cdot 4 & 3 \cdot 6 & 3 \cdot - 8 & 3 \cdot 7 \\ 3 \cdot 5 & 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 4 \end{array}]$

Step 1.4.8

Multiply $3$ by $- 1$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 21 & - 27 & 12 \\ 0 & 9 & 3 & - 3 \\ 3 \cdot 4 & 3 \cdot 6 & 3 \cdot - 8 & 3 \cdot 7 \\ 3 \cdot 5 & 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 4 \end{array}]$

Step 1.4.9

Multiply $3$ by $4$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 21 & - 27 & 12 \\ 0 & 9 & 3 & - 3 \\ 12 & 3 \cdot 6 & 3 \cdot - 8 & 3 \cdot 7 \\ 3 \cdot 5 & 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 4 \end{array}]$

Step 1.4.10

Multiply $3$ by $6$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 21 & - 27 & 12 \\ 0 & 9 & 3 & - 3 \\ 12 & 18 & 3 \cdot - 8 & 3 \cdot 7 \\ 3 \cdot 5 & 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 4 \end{array}]$

Step 1.4.11

Multiply $3$ by $- 8$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 21 & - 27 & 12 \\ 0 & 9 & 3 & - 3 \\ 12 & 18 & - 24 & 3 \cdot 7 \\ 3 \cdot 5 & 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 4 \end{array}]$

Step 1.4.12

Multiply $3$ by $7$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 21 & - 27 & 12 \\ 0 & 9 & 3 & - 3 \\ 12 & 18 & - 24 & 21 \\ 3 \cdot 5 & 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 4 \end{array}]$

Step 1.4.13

Multiply $3$ by $5$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 21 & - 27 & 12 \\ 0 & 9 & 3 & - 3 \\ 12 & 18 & - 24 & 21 \\ 15 & 3 \cdot 0 & 3 \cdot 3 & 3 \cdot 4 \end{array}]$

Step 1.4.14

Multiply $3$ by $0$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 21 & - 27 & 12 \\ 0 & 9 & 3 & - 3 \\ 12 & 18 & - 24 & 21 \\ 15 & 0 & 3 \cdot 3 & 3 \cdot 4 \end{array}]$

Step 1.4.15

Multiply $3$ by $3$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 21 & - 27 & 12 \\ 0 & 9 & 3 & - 3 \\ 12 & 18 & - 24 & 21 \\ 15 & 0 & 9 & 3 \cdot 4 \end{array}]$

Step 1.4.16

Multiply $3$ by $4$ .

$[\begin{array}{c} 2 & 4 & 6 & 8 \\ - 4 & - 6 & - 8 & - 10 \\ 0 & 6 & 4 & 2 \\ - 2 & 4 & - 4 & 0 \end{array}] + [\begin{array}{c} 15 & 21 & - 27 & 12 \\ 0 & 9 & 3 & - 3 \\ 12 & 18 & - 24 & 21 \\ 15 & 0 & 9 & 12 \end{array}]$

Step 2

Add the corresponding elements.

$[\begin{array}{c} 2 + 15 & 4 + 21 & 6 - 27 & 8 + 12 \\ - 4 + 0 & - 6 + 9 & - 8 + 3 & - 10 - 3 \\ 0 + 12 & 6 + 18 & 4 - 24 & 2 + 21 \\ - 2 + 15 & 4 + 0 & - 4 + 9 & 0 + 12 \end{array}]$

Step 3

Simplify each element.

Tap for more steps...

Step 3.1

Add $2$ and $15$ .

$[\begin{array}{c} 17 & 4 + 21 & 6 - 27 & 8 + 12 \\ - 4 + 0 & - 6 + 9 & - 8 + 3 & - 10 - 3 \\ 0 + 12 & 6 + 18 & 4 - 24 & 2 + 21 \\ - 2 + 15 & 4 + 0 & - 4 + 9 & 0 + 12 \end{array}]$

Step 3.2

Add $4$ and $21$ .

$[\begin{array}{c} 17 & 25 & 6 - 27 & 8 + 12 \\ - 4 + 0 & - 6 + 9 & - 8 + 3 & - 10 - 3 \\ 0 + 12 & 6 + 18 & 4 - 24 & 2 + 21 \\ - 2 + 15 & 4 + 0 & - 4 + 9 & 0 + 12 \end{array}]$

Step 3.3

Subtract $27$ from $6$ .

$[\begin{array}{c} 17 & 25 & - 21 & 8 + 12 \\ - 4 + 0 & - 6 + 9 & - 8 + 3 & - 10 - 3 \\ 0 + 12 & 6 + 18 & 4 - 24 & 2 + 21 \\ - 2 + 15 & 4 + 0 & - 4 + 9 & 0 + 12 \end{array}]$

Step 3.4

Add $8$ and $12$ .

$[\begin{array}{c} 17 & 25 & - 21 & 20 \\ - 4 + 0 & - 6 + 9 & - 8 + 3 & - 10 - 3 \\ 0 + 12 & 6 + 18 & 4 - 24 & 2 + 21 \\ - 2 + 15 & 4 + 0 & - 4 + 9 & 0 + 12 \end{array}]$

Step 3.5

Add $- 4$ and $0$ .

$[\begin{array}{c} 17 & 25 & - 21 & 20 \\ - 4 & - 6 + 9 & - 8 + 3 & - 10 - 3 \\ 0 + 12 & 6 + 18 & 4 - 24 & 2 + 21 \\ - 2 + 15 & 4 + 0 & - 4 + 9 & 0 + 12 \end{array}]$

Step 3.6

Add $- 6$ and $9$ .

$[\begin{array}{c} 17 & 25 & - 21 & 20 \\ - 4 & 3 & - 8 + 3 & - 10 - 3 \\ 0 + 12 & 6 + 18 & 4 - 24 & 2 + 21 \\ - 2 + 15 & 4 + 0 & - 4 + 9 & 0 + 12 \end{array}]$

Step 3.7

Add $- 8$ and $3$ .

$[\begin{array}{c} 17 & 25 & - 21 & 20 \\ - 4 & 3 & - 5 & - 10 - 3 \\ 0 + 12 & 6 + 18 & 4 - 24 & 2 + 21 \\ - 2 + 15 & 4 + 0 & - 4 + 9 & 0 + 12 \end{array}]$

Step 3.8

Subtract $3$ from $- 10$ .

$[\begin{array}{c} 17 & 25 & - 21 & 20 \\ - 4 & 3 & - 5 & - 13 \\ 0 + 12 & 6 + 18 & 4 - 24 & 2 + 21 \\ - 2 + 15 & 4 + 0 & - 4 + 9 & 0 + 12 \end{array}]$

Step 3.9

Add $0$ and $12$ .

$[\begin{array}{c} 17 & 25 & - 21 & 20 \\ - 4 & 3 & - 5 & - 13 \\ 12 & 6 + 18 & 4 - 24 & 2 + 21 \\ - 2 + 15 & 4 + 0 & - 4 + 9 & 0 + 12 \end{array}]$

Step 3.10

Add $6$ and $18$ .

$[\begin{array}{c} 17 & 25 & - 21 & 20 \\ - 4 & 3 & - 5 & - 13 \\ 12 & 24 & 4 - 24 & 2 + 21 \\ - 2 + 15 & 4 + 0 & - 4 + 9 & 0 + 12 \end{array}]$

Step 3.11

Subtract $24$ from $4$ .

$[\begin{array}{c} 17 & 25 & - 21 & 20 \\ - 4 & 3 & - 5 & - 13 \\ 12 & 24 & - 20 & 2 + 21 \\ - 2 + 15 & 4 + 0 & - 4 + 9 & 0 + 12 \end{array}]$

Step 3.12

Add $2$ and $21$ .

$[\begin{array}{c} 17 & 25 & - 21 & 20 \\ - 4 & 3 & - 5 & - 13 \\ 12 & 24 & - 20 & 23 \\ - 2 + 15 & 4 + 0 & - 4 + 9 & 0 + 12 \end{array}]$

Step 3.13

Add $- 2$ and $15$ .

$[\begin{array}{c} 17 & 25 & - 21 & 20 \\ - 4 & 3 & - 5 & - 13 \\ 12 & 24 & - 20 & 23 \\ 13 & 4 + 0 & - 4 + 9 & 0 + 12 \end{array}]$

Step 3.14

Add $4$ and $0$ .

$[\begin{array}{c} 17 & 25 & - 21 & 20 \\ - 4 & 3 & - 5 & - 13 \\ 12 & 24 & - 20 & 23 \\ 13 & 4 & - 4 + 9 & 0 + 12 \end{array}]$

Step 3.15

Add $- 4$ and $9$ .

$[\begin{array}{c} 17 & 25 & - 21 & 20 \\ - 4 & 3 & - 5 & - 13 \\ 12 & 24 & - 20 & 23 \\ 13 & 4 & 5 & 0 + 12 \end{array}]$

Step 3.16

Add $0$ and $12$ .

$[\begin{array}{c} 17 & 25 & - 21 & 20 \\ - 4 & 3 & - 5 & - 13 \\ 12 & 24 & - 20 & 23 \\ 13 & 4 & 5 & 12 \end{array}]$