Finite Math Examples

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

Step 1

Move all terms not containing a variable to the right side.

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Step 1.1

Subtract $[\begin{array}{c} 3 & - 8 \\ 5 & 2 \\ - 4 & 7 \end{array}]$ from both sides of the equation.

$2 x = [\begin{array}{c} - 3 & 4 \\ 5 & 0 \\ 2 & 7 \end{array}] - [\begin{array}{c} 3 & - 8 \\ 5 & 2 \\ - 4 & 7 \end{array}]$

Step 2

Simplify the right side.

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Step 2.1

Subtract the corresponding elements.

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

Step 2.2

Simplify each element.

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Step 2.2.1

Subtract $3$ from $- 3$ .

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

Step 2.2.2

Add $4$ and $8$ .

$2 x = [\begin{array}{c} - 6 & 12 \\ 5 - 5 & 0 - 2 \\ 2 + 4 & 7 - 7 \end{array}]$

Step 2.2.3

Subtract $5$ from $5$ .

$2 x = [\begin{array}{c} - 6 & 12 \\ 0 & 0 - 2 \\ 2 + 4 & 7 - 7 \end{array}]$

Step 2.2.4

Subtract $2$ from $0$ .

$2 x = [\begin{array}{c} - 6 & 12 \\ 0 & - 2 \\ 2 + 4 & 7 - 7 \end{array}]$

Step 2.2.5

Add $2$ and $4$ .

$2 x = [\begin{array}{c} - 6 & 12 \\ 0 & - 2 \\ 6 & 7 - 7 \end{array}]$

Step 2.2.6

Subtract $7$ from $7$ .

$2 x = [\begin{array}{c} - 6 & 12 \\ 0 & - 2 \\ 6 & 0 \end{array}]$

Step 3

Multiply both sides by $\frac{1}{2}$ .

$\frac{1}{2} (2 x) = \frac{1}{2} [\begin{array}{c} - 6 & 12 \\ 0 & - 2 \\ 6 & 0 \end{array}]$

Step 4

Simplify.

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Step 4.1

Cancel the common factor of $2$ .

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Step 4.1.1

Factor $2$ out of $2 x$ .

$\frac{1}{2} (2 (x)) = \frac{1}{2} [\begin{array}{c} - 6 & 12 \\ 0 & - 2 \\ 6 & 0 \end{array}]$

Step 4.1.2

Cancel the common factor.

$\frac{1}{2} (2 x) = \frac{1}{2} [\begin{array}{c} - 6 & 12 \\ 0 & - 2 \\ 6 & 0 \end{array}]$

Step 4.1.3

Rewrite the expression.

$x = \frac{1}{2} [\begin{array}{c} - 6 & 12 \\ 0 & - 2 \\ 6 & 0 \end{array}]$

Step 4.2

Multiply $\frac{1}{2}$ by each element of the matrix.

$x = [\begin{array}{c} \frac{1}{2} \cdot - 6 & \frac{1}{2} \cdot 12 \\ \frac{1}{2} \cdot 0 & \frac{1}{2} \cdot - 2 \\ \frac{1}{2} \cdot 6 & \frac{1}{2} \cdot 0 \end{array}]$

Step 4.3

Simplify each element in the matrix.

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Step 4.3.1

Cancel the common factor of $2$ .

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Step 4.3.1.1

Factor $2$ out of $- 6$ .

$x = [\begin{array}{c} \frac{1}{2} \cdot (2 (- 3)) & \frac{1}{2} \cdot 12 \\ \frac{1}{2} \cdot 0 & \frac{1}{2} \cdot - 2 \\ \frac{1}{2} \cdot 6 & \frac{1}{2} \cdot 0 \end{array}]$

Step 4.3.1.2

Cancel the common factor.

$x = [\begin{array}{c} \frac{1}{2} \cdot (2 \cdot - 3) & \frac{1}{2} \cdot 12 \\ \frac{1}{2} \cdot 0 & \frac{1}{2} \cdot - 2 \\ \frac{1}{2} \cdot 6 & \frac{1}{2} \cdot 0 \end{array}]$

Step 4.3.1.3

Rewrite the expression.

$x = [\begin{array}{c} - 3 & \frac{1}{2} \cdot 12 \\ \frac{1}{2} \cdot 0 & \frac{1}{2} \cdot - 2 \\ \frac{1}{2} \cdot 6 & \frac{1}{2} \cdot 0 \end{array}]$

Step 4.3.2

Cancel the common factor of $2$ .

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Step 4.3.2.1

Factor $2$ out of $12$ .

$x = [\begin{array}{c} - 3 & \frac{1}{2} \cdot (2 (6)) \\ \frac{1}{2} \cdot 0 & \frac{1}{2} \cdot - 2 \\ \frac{1}{2} \cdot 6 & \frac{1}{2} \cdot 0 \end{array}]$

Step 4.3.2.2

Cancel the common factor.

$x = [\begin{array}{c} - 3 & \frac{1}{2} \cdot (2 \cdot 6) \\ \frac{1}{2} \cdot 0 & \frac{1}{2} \cdot - 2 \\ \frac{1}{2} \cdot 6 & \frac{1}{2} \cdot 0 \end{array}]$

Step 4.3.2.3

Rewrite the expression.

$x = [\begin{array}{c} - 3 & 6 \\ \frac{1}{2} \cdot 0 & \frac{1}{2} \cdot - 2 \\ \frac{1}{2} \cdot 6 & \frac{1}{2} \cdot 0 \end{array}]$

Step 4.3.3

Multiply $\frac{1}{2}$ by $0$ .

$x = [\begin{array}{c} - 3 & 6 \\ 0 & \frac{1}{2} \cdot - 2 \\ \frac{1}{2} \cdot 6 & \frac{1}{2} \cdot 0 \end{array}]$

Step 4.3.4

Cancel the common factor of $2$ .

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Step 4.3.4.1

Factor $2$ out of $- 2$ .

$x = [\begin{array}{c} - 3 & 6 \\ 0 & \frac{1}{2} \cdot (2 (- 1)) \\ \frac{1}{2} \cdot 6 & \frac{1}{2} \cdot 0 \end{array}]$

Step 4.3.4.2

Cancel the common factor.

$x = [\begin{array}{c} - 3 & 6 \\ 0 & \frac{1}{2} \cdot (2 \cdot - 1) \\ \frac{1}{2} \cdot 6 & \frac{1}{2} \cdot 0 \end{array}]$

Step 4.3.4.3

Rewrite the expression.

$x = [\begin{array}{c} - 3 & 6 \\ 0 & - 1 \\ \frac{1}{2} \cdot 6 & \frac{1}{2} \cdot 0 \end{array}]$

Step 4.3.5

Cancel the common factor of $2$ .

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Step 4.3.5.1

Factor $2$ out of $6$ .

$x = [\begin{array}{c} - 3 & 6 \\ 0 & - 1 \\ \frac{1}{2} \cdot (2 (3)) & \frac{1}{2} \cdot 0 \end{array}]$

Step 4.3.5.2

Cancel the common factor.

$x = [\begin{array}{c} - 3 & 6 \\ 0 & - 1 \\ \frac{1}{2} \cdot (2 \cdot 3) & \frac{1}{2} \cdot 0 \end{array}]$

Step 4.3.5.3

Rewrite the expression.

$x = [\begin{array}{c} - 3 & 6 \\ 0 & - 1 \\ 3 & \frac{1}{2} \cdot 0 \end{array}]$

Step 4.3.6

Multiply $\frac{1}{2}$ by $0$ .

$x = [\begin{array}{c} - 3 & 6 \\ 0 & - 1 \\ 3 & 0 \end{array}]$