Algebra Examples

$[\begin{array}{c} 7 & 5 \\ 1 & - 3 \end{array}] + 2 x = [\begin{array}{c} 13 & 1 \\ 9 & - 15 \end{array}]$

Subtract the matrix from both sides of the equation.

$[\begin{array}{c} 7 & 5 \\ 1 & - 3 \end{array}] + 2 X - [\begin{array}{c} 7 & 5 \\ 1 & - 3 \end{array}] = [\begin{array}{c} 13 & 1 \\ 9 & - 15 \end{array}] - [\begin{array}{c} 7 & 5 \\ 1 & - 3 \end{array}]$

Simplify both sides of the equation.

Tap for more steps...

Simplify the left side of the equation.

Tap for more steps...

Subtract the corresponding elements.

$[\begin{array}{c} 7 - 7 & 5 - 5 \\ 1 - 1 & - 3 - (- 3) \end{array}] + 2 X = [\begin{array}{c} 13 & 1 \\ 9 & - 15 \end{array}] - [\begin{array}{c} 7 & 5 \\ 1 & - 3 \end{array}]$

Simplify each element of the matrix $[\begin{array}{c} 7 - 7 & 5 - 5 \\ 1 - 1 & - 3 - (- 3) \end{array}]$ .

Tap for more steps...

Simplify $7 - 7$ .

$[\begin{array}{c} 0 & 5 - 5 \\ 1 - 1 & - 3 - (- 3) \end{array}] + 2 X = [\begin{array}{c} 13 & 1 \\ 9 & - 15 \end{array}] - [\begin{array}{c} 7 & 5 \\ 1 & - 3 \end{array}]$

Simplify $5 - 5$ .

$[\begin{array}{c} 0 & 0 \\ 1 - 1 & - 3 - (- 3) \end{array}] + 2 X = [\begin{array}{c} 13 & 1 \\ 9 & - 15 \end{array}] - [\begin{array}{c} 7 & 5 \\ 1 & - 3 \end{array}]$

Simplify $1 - 1$ .

$[\begin{array}{c} 0 & 0 \\ 0 & - 3 - (- 3) \end{array}] + 2 X = [\begin{array}{c} 13 & 1 \\ 9 & - 15 \end{array}] - [\begin{array}{c} 7 & 5 \\ 1 & - 3 \end{array}]$

Simplify $- 3 - (- 3)$ .

$[\begin{array}{c} 0 & 0 \\ 0 & 0 \end{array}] + 2 X = [\begin{array}{c} 13 & 1 \\ 9 & - 15 \end{array}] - [\begin{array}{c} 7 & 5 \\ 1 & - 3 \end{array}]$

Simplify the right side of the equation.

Tap for more steps...

Subtract the corresponding elements.

$[\begin{array}{c} 0 & 0 \\ 0 & 0 \end{array}] + 2 X = [\begin{array}{c} 13 - 7 & 1 - 5 \\ 9 - 1 & - 15 - (- 3) \end{array}]$

Simplify each element of the matrix $[\begin{array}{c} 13 - 7 & 1 - 5 \\ 9 - 1 & - 15 - (- 3) \end{array}]$ .

Tap for more steps...

Simplify $13 - 7$ .

$[\begin{array}{c} 0 & 0 \\ 0 & 0 \end{array}] + 2 X = [\begin{array}{c} 6 & 1 - 5 \\ 9 - 1 & - 15 - (- 3) \end{array}]$

Simplify $1 - 5$ .

$[\begin{array}{c} 0 & 0 \\ 0 & 0 \end{array}] + 2 X = [\begin{array}{c} 6 & - 4 \\ 9 - 1 & - 15 - (- 3) \end{array}]$

Simplify $9 - 1$ .

$[\begin{array}{c} 0 & 0 \\ 0 & 0 \end{array}] + 2 X = [\begin{array}{c} 6 & - 4 \\ 8 & - 15 - (- 3) \end{array}]$

Simplify $- 15 - (- 3)$ .

$[\begin{array}{c} 0 & 0 \\ 0 & 0 \end{array}] + 2 X = [\begin{array}{c} 6 & - 4 \\ 8 & - 12 \end{array}]$

Adding the null matrix to any matrix is a matrix itself.

$2 X = [\begin{array}{c} 6 & - 4 \\ 8 & - 12 \end{array}]$

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

$\frac{1}{2} \cdot (2 X) = \frac{1}{2} \cdot [\begin{array}{c} 6 & - 4 \\ 8 & - 12 \end{array}]$

Simplify both sides of the equation.

Tap for more steps...

Cancel the common factor of $2$ .

Tap for more steps...

Factor $2$ out of $2 X$ .

$\frac{1}{2} \cdot (2 (X)) = \frac{1}{2} \cdot [\begin{array}{c} 6 & - 4 \\ 8 & - 12 \end{array}]$

Cancel the common factor.

$\frac{1}{2} \cdot (2 X) = \frac{1}{2} \cdot [\begin{array}{c} 6 & - 4 \\ 8 & - 12 \end{array}]$

Rewrite the expression.

$X = \frac{1}{2} \cdot [\begin{array}{c} 6 & - 4 \\ 8 & - 12 \end{array}]$

Simplify the right side of the equation.

Tap for more steps...

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

$X = [\begin{array}{c} \frac{1}{2} \cdot 6 & \frac{1}{2} \cdot - 4 \\ \frac{1}{2} \cdot 8 & \frac{1}{2} \cdot - 12 \end{array}]$

Simplify each element in the matrix.

Tap for more steps...

Rearrange $\frac{1}{2} \cdot 6$ .

$X = [\begin{array}{c} 3 & \frac{1}{2} \cdot - 4 \\ \frac{1}{2} \cdot 8 & \frac{1}{2} \cdot - 12 \end{array}]$

Rearrange $\frac{1}{2} \cdot - 4$ .

$X = [\begin{array}{c} 3 & - 2 \\ \frac{1}{2} \cdot 8 & \frac{1}{2} \cdot - 12 \end{array}]$

Rearrange $\frac{1}{2} \cdot 8$ .

$X = [\begin{array}{c} 3 & - 2 \\ 4 & \frac{1}{2} \cdot - 12 \end{array}]$

Rearrange $\frac{1}{2} \cdot - 12$ .

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