Algebra Examples

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

Step 1

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

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Step 1.1

Subtract $[\begin{array}{c} 3 & 4 & 7 \\ 2 & 5 & 1 \\ 8 & 2 & 5 \end{array}]$ from both sides of the equation.

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

Step 2

Simplify the right side.

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Step 2.1

Subtract the corresponding elements.

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

Step 2.2

Simplify each element.

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Step 2.2.1

Subtract $3$ from $2$ .

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

Step 2.2.2

Subtract $4$ from $6$ .

$- x = [\begin{array}{c} - 1 & 2 & 8 - 7 \\ 3 - 2 & 9 - 5 & 3 - 1 \\ 2 - 8 & 5 - 2 & 1 - 5 \end{array}]$

Step 2.2.3

Subtract $7$ from $8$ .

$- x = [\begin{array}{c} - 1 & 2 & 1 \\ 3 - 2 & 9 - 5 & 3 - 1 \\ 2 - 8 & 5 - 2 & 1 - 5 \end{array}]$

Step 2.2.4

Subtract $2$ from $3$ .

$- x = [\begin{array}{c} - 1 & 2 & 1 \\ 1 & 9 - 5 & 3 - 1 \\ 2 - 8 & 5 - 2 & 1 - 5 \end{array}]$

Step 2.2.5

Subtract $5$ from $9$ .

$- x = [\begin{array}{c} - 1 & 2 & 1 \\ 1 & 4 & 3 - 1 \\ 2 - 8 & 5 - 2 & 1 - 5 \end{array}]$

Step 2.2.6

Subtract $1$ from $3$ .

$- x = [\begin{array}{c} - 1 & 2 & 1 \\ 1 & 4 & 2 \\ 2 - 8 & 5 - 2 & 1 - 5 \end{array}]$

Step 2.2.7

Subtract $8$ from $2$ .

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

Step 2.2.8

Subtract $2$ from $5$ .

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

Step 2.2.9

Subtract $5$ from $1$ .

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

Step 3

Multiply both sides by $- 1$ .

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

Step 4

Simplify.

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Step 4.1

Multiply $- - x$ .

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Step 4.1.1

Multiply $- 1$ by $- 1$ .

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

Step 4.1.2

Multiply $x$ by $1$ .

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

Step 4.2

Multiply $- 1$ by each element of the matrix.

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

Step 4.3

Simplify each element in the matrix.

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Step 4.3.1

Multiply $- 1$ by $- 1$ .

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

Step 4.3.2

Multiply $- 1$ by $2$ .

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

Step 4.3.3

Multiply $- 1$ by $1$ .

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

Step 4.3.4

Multiply $- 1$ by $1$ .

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

Step 4.3.5

Multiply $- 1$ by $4$ .

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

Step 4.3.6

Multiply $- 1$ by $2$ .

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

Step 4.3.7

Multiply $- 1$ by $- 6$ .

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

Step 4.3.8

Multiply $- 1$ by $3$ .

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

Step 4.3.9

Multiply $- 1$ by $- 4$ .

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