Finite Math Examples

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

Step 1

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

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Step 1.1

Add $[\begin{array}{c} - 1 & 2 & - 1 \\ 4 & 2 & 3 \end{array}]$ to both sides of the equation.

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

Step 2

Simplify the right side.

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Step 2.1

Add the corresponding elements.

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

Step 2.2

Simplify each element.

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Step 2.2.1

Subtract $1$ from $5$ .

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

Step 2.2.2

Add $0$ and $2$ .

$2 x = [\begin{array}{c} 4 & 2 & - 1 - 1 \\ 4 + 4 & - 6 + 2 & 7 + 3 \end{array}]$

Step 2.2.3

Subtract $1$ from $- 1$ .

$2 x = [\begin{array}{c} 4 & 2 & - 2 \\ 4 + 4 & - 6 + 2 & 7 + 3 \end{array}]$

Step 2.2.4

Add $4$ and $4$ .

$2 x = [\begin{array}{c} 4 & 2 & - 2 \\ 8 & - 6 + 2 & 7 + 3 \end{array}]$

Step 2.2.5

Add $- 6$ and $2$ .

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

Step 2.2.6

Add $7$ and $3$ .

$2 x = [\begin{array}{c} 4 & 2 & - 2 \\ 8 & - 4 & 10 \end{array}]$

Step 3

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

$\frac{1}{2} (2 x) = \frac{1}{2} [\begin{array}{c} 4 & 2 & - 2 \\ 8 & - 4 & 10 \end{array}]$

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 $2 x$ .

$\frac{1}{2} (2 (x)) = \frac{1}{2} [\begin{array}{c} 4 & 2 & - 2 \\ 8 & - 4 & 10 \end{array}]$

Step 4.1.2

Cancel the common factor.

$\frac{1}{2} (2 x) = \frac{1}{2} [\begin{array}{c} 4 & 2 & - 2 \\ 8 & - 4 & 10 \end{array}]$

Step 4.1.3

Rewrite the expression.

$x = \frac{1}{2} [\begin{array}{c} 4 & 2 & - 2 \\ 8 & - 4 & 10 \end{array}]$

Step 4.2

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

$x = [\begin{array}{c} \frac{1}{2} \cdot 4 & \frac{1}{2} \cdot 2 & \frac{1}{2} \cdot - 2 \\ \frac{1}{2} \cdot 8 & \frac{1}{2} \cdot - 4 & \frac{1}{2} \cdot 10 \end{array}]$

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 $4$ .

$x = [\begin{array}{c} \frac{1}{2} \cdot (2 (2)) & \frac{1}{2} \cdot 2 & \frac{1}{2} \cdot - 2 \\ \frac{1}{2} \cdot 8 & \frac{1}{2} \cdot - 4 & \frac{1}{2} \cdot 10 \end{array}]$

Step 4.3.1.2

Cancel the common factor.

$x = [\begin{array}{c} \frac{1}{2} \cdot (2 \cdot 2) & \frac{1}{2} \cdot 2 & \frac{1}{2} \cdot - 2 \\ \frac{1}{2} \cdot 8 & \frac{1}{2} \cdot - 4 & \frac{1}{2} \cdot 10 \end{array}]$

Step 4.3.1.3

Rewrite the expression.

$x = [\begin{array}{c} 2 & \frac{1}{2} \cdot 2 & \frac{1}{2} \cdot - 2 \\ \frac{1}{2} \cdot 8 & \frac{1}{2} \cdot - 4 & \frac{1}{2} \cdot 10 \end{array}]$

Step 4.3.2

Cancel the common factor of $2$ .

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Step 4.3.2.1

Cancel the common factor.

$x = [\begin{array}{c} 2 & \frac{1}{2} \cdot 2 & \frac{1}{2} \cdot - 2 \\ \frac{1}{2} \cdot 8 & \frac{1}{2} \cdot - 4 & \frac{1}{2} \cdot 10 \end{array}]$

Step 4.3.2.2

Rewrite the expression.

$x = [\begin{array}{c} 2 & 1 & \frac{1}{2} \cdot - 2 \\ \frac{1}{2} \cdot 8 & \frac{1}{2} \cdot - 4 & \frac{1}{2} \cdot 10 \end{array}]$

Step 4.3.3

Cancel the common factor of $2$ .

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Step 4.3.3.1

Factor $2$ out of $- 2$ .

$x = [\begin{array}{c} 2 & 1 & \frac{1}{2} \cdot (2 (- 1)) \\ \frac{1}{2} \cdot 8 & \frac{1}{2} \cdot - 4 & \frac{1}{2} \cdot 10 \end{array}]$

Step 4.3.3.2

Cancel the common factor.

$x = [\begin{array}{c} 2 & 1 & \frac{1}{2} \cdot (2 \cdot - 1) \\ \frac{1}{2} \cdot 8 & \frac{1}{2} \cdot - 4 & \frac{1}{2} \cdot 10 \end{array}]$

Step 4.3.3.3

Rewrite the expression.

$x = [\begin{array}{c} 2 & 1 & - 1 \\ \frac{1}{2} \cdot 8 & \frac{1}{2} \cdot - 4 & \frac{1}{2} \cdot 10 \end{array}]$

Step 4.3.4

Cancel the common factor of $2$ .

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Step 4.3.4.1

Factor $2$ out of $8$ .

$x = [\begin{array}{c} 2 & 1 & - 1 \\ \frac{1}{2} \cdot (2 (4)) & \frac{1}{2} \cdot - 4 & \frac{1}{2} \cdot 10 \end{array}]$

Step 4.3.4.2

Cancel the common factor.

$x = [\begin{array}{c} 2 & 1 & - 1 \\ \frac{1}{2} \cdot (2 \cdot 4) & \frac{1}{2} \cdot - 4 & \frac{1}{2} \cdot 10 \end{array}]$

Step 4.3.4.3

Rewrite the expression.

$x = [\begin{array}{c} 2 & 1 & - 1 \\ 4 & \frac{1}{2} \cdot - 4 & \frac{1}{2} \cdot 10 \end{array}]$

Step 4.3.5

Cancel the common factor of $2$ .

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Step 4.3.5.1

Factor $2$ out of $- 4$ .

$x = [\begin{array}{c} 2 & 1 & - 1 \\ 4 & \frac{1}{2} \cdot (2 (- 2)) & \frac{1}{2} \cdot 10 \end{array}]$

Step 4.3.5.2

Cancel the common factor.

$x = [\begin{array}{c} 2 & 1 & - 1 \\ 4 & \frac{1}{2} \cdot (2 \cdot - 2) & \frac{1}{2} \cdot 10 \end{array}]$

Step 4.3.5.3

Rewrite the expression.

$x = [\begin{array}{c} 2 & 1 & - 1 \\ 4 & - 2 & \frac{1}{2} \cdot 10 \end{array}]$

Step 4.3.6

Cancel the common factor of $2$ .

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Step 4.3.6.1

Factor $2$ out of $10$ .

$x = [\begin{array}{c} 2 & 1 & - 1 \\ 4 & - 2 & \frac{1}{2} \cdot (2 (5)) \end{array}]$

Step 4.3.6.2

Cancel the common factor.

$x = [\begin{array}{c} 2 & 1 & - 1 \\ 4 & - 2 & \frac{1}{2} \cdot (2 \cdot 5) \end{array}]$

Step 4.3.6.3

Rewrite the expression.

$x = [\begin{array}{c} 2 & 1 & - 1 \\ 4 & - 2 & 5 \end{array}]$