Algebra Examples

$- 5 X + [\begin{array}{c} 5 & 5 \\ 2 & - 1 \\ - 8 & 16 \end{array}] = [\begin{array}{c} 10 & - 25 \\ 17 & - 31 \\ - 23 & 11 \end{array}]$

Step 1

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

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Step 1.1

Subtract $[\begin{array}{c} 5 & 5 \\ 2 & - 1 \\ - 8 & 16 \end{array}]$ from both sides of the equation.

$- 5 X = [\begin{array}{c} 10 & - 25 \\ 17 & - 31 \\ - 23 & 11 \end{array}] - [\begin{array}{c} 5 & 5 \\ 2 & - 1 \\ - 8 & 16 \end{array}]$

Step 2

Simplify the right side.

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Step 2.1

Subtract the corresponding elements.

$- 5 X = [\begin{array}{c} 10 - 5 & - 25 - 5 \\ 17 - 2 & - 31 + 1 \\ - 23 + 8 & 11 - 16 \end{array}]$

Step 2.2

Simplify each element.

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Step 2.2.1

Subtract $5$ from $10$ .

$- 5 X = [\begin{array}{c} 5 & - 25 - 5 \\ 17 - 2 & - 31 + 1 \\ - 23 + 8 & 11 - 16 \end{array}]$

Step 2.2.2

Subtract $5$ from $- 25$ .

$- 5 X = [\begin{array}{c} 5 & - 30 \\ 17 - 2 & - 31 + 1 \\ - 23 + 8 & 11 - 16 \end{array}]$

Step 2.2.3

Subtract $2$ from $17$ .

$- 5 X = [\begin{array}{c} 5 & - 30 \\ 15 & - 31 + 1 \\ - 23 + 8 & 11 - 16 \end{array}]$

Step 2.2.4

Add $- 31$ and $1$ .

$- 5 X = [\begin{array}{c} 5 & - 30 \\ 15 & - 30 \\ - 23 + 8 & 11 - 16 \end{array}]$

Step 2.2.5

Add $- 23$ and $8$ .

$- 5 X = [\begin{array}{c} 5 & - 30 \\ 15 & - 30 \\ - 15 & 11 - 16 \end{array}]$

Step 2.2.6

Subtract $16$ from $11$ .

$- 5 X = [\begin{array}{c} 5 & - 30 \\ 15 & - 30 \\ - 15 & - 5 \end{array}]$

Step 3

Multiply both sides by $- \frac{1}{5}$ .

$- \frac{1}{5} (- 5 X) = - \frac{1}{5} [\begin{array}{c} 5 & - 30 \\ 15 & - 30 \\ - 15 & - 5 \end{array}]$

Step 4

Simplify.

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Step 4.1

Cancel the common factor of $5$ .

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Step 4.1.1

Move the leading negative in $- \frac{1}{5}$ into the numerator.

$\frac{- 1}{5} (- 5 X) = - \frac{1}{5} [\begin{array}{c} 5 & - 30 \\ 15 & - 30 \\ - 15 & - 5 \end{array}]$

Step 4.1.2

Factor $5$ out of $- 5 X$ .

$\frac{- 1}{5} (5 (- X)) = - \frac{1}{5} [\begin{array}{c} 5 & - 30 \\ 15 & - 30 \\ - 15 & - 5 \end{array}]$

Step 4.1.3

Cancel the common factor.

$\frac{- 1}{5} (5 (- X)) = - \frac{1}{5} [\begin{array}{c} 5 & - 30 \\ 15 & - 30 \\ - 15 & - 5 \end{array}]$

Step 4.1.4

Rewrite the expression.

$- - X = - \frac{1}{5} [\begin{array}{c} 5 & - 30 \\ 15 & - 30 \\ - 15 & - 5 \end{array}]$

Step 4.2

Multiply $- 1$ by $- 1$ .

$1 X = - \frac{1}{5} [\begin{array}{c} 5 & - 30 \\ 15 & - 30 \\ - 15 & - 5 \end{array}]$

Step 4.3

Multiply $X$ by $1$ .

$X = - \frac{1}{5} [\begin{array}{c} 5 & - 30 \\ 15 & - 30 \\ - 15 & - 5 \end{array}]$

Step 4.4

Multiply $- \frac{1}{5}$ by each element of the matrix.

$X = [\begin{array}{c} - \frac{1}{5} \cdot 5 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot 15 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5

Simplify each element in the matrix.

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Step 4.5.1

Cancel the common factor of $5$ .

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Step 4.5.1.1

Move the leading negative in $- \frac{1}{5}$ into the numerator.

$X = [\begin{array}{c} \frac{- 1}{5} \cdot 5 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot 15 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.1.2

Cancel the common factor.

$X = [\begin{array}{c} \frac{- 1}{5} \cdot 5 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot 15 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.1.3

Rewrite the expression.

$X = [\begin{array}{c} - 1 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot 15 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.2

Cancel the common factor of $5$ .

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Step 4.5.2.1

Move the leading negative in $- \frac{1}{5}$ into the numerator.

$X = [\begin{array}{c} - 1 & \frac{- 1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot 15 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.2.2

Factor $5$ out of $- 30$ .

$X = [\begin{array}{c} - 1 & \frac{- 1}{5} \cdot (5 (- 6)) \\ - \frac{1}{5} \cdot 15 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.2.3

Cancel the common factor.

$X = [\begin{array}{c} - 1 & \frac{- 1}{5} \cdot (5 \cdot - 6) \\ - \frac{1}{5} \cdot 15 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.2.4

Rewrite the expression.

$X = [\begin{array}{c} - 1 & - 1 \cdot - 6 \\ - \frac{1}{5} \cdot 15 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.3

Multiply $- 1$ by $- 6$ .

$X = [\begin{array}{c} - 1 & 6 \\ - \frac{1}{5} \cdot 15 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.4

Cancel the common factor of $5$ .

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Step 4.5.4.1

Move the leading negative in $- \frac{1}{5}$ into the numerator.

$X = [\begin{array}{c} - 1 & 6 \\ \frac{- 1}{5} \cdot 15 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.4.2

Factor $5$ out of $15$ .

$X = [\begin{array}{c} - 1 & 6 \\ \frac{- 1}{5} \cdot (5 (3)) & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.4.3

Cancel the common factor.

$X = [\begin{array}{c} - 1 & 6 \\ \frac{- 1}{5} \cdot (5 \cdot 3) & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.4.4

Rewrite the expression.

$X = [\begin{array}{c} - 1 & 6 \\ - 1 \cdot 3 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.5

Multiply $- 1$ by $3$ .

$X = [\begin{array}{c} - 1 & 6 \\ - 3 & - \frac{1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.6

Cancel the common factor of $5$ .

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Step 4.5.6.1

Move the leading negative in $- \frac{1}{5}$ into the numerator.

$X = [\begin{array}{c} - 1 & 6 \\ - 3 & \frac{- 1}{5} \cdot - 30 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.6.2

Factor $5$ out of $- 30$ .

$X = [\begin{array}{c} - 1 & 6 \\ - 3 & \frac{- 1}{5} \cdot (5 (- 6)) \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.6.3

Cancel the common factor.

$X = [\begin{array}{c} - 1 & 6 \\ - 3 & \frac{- 1}{5} \cdot (5 \cdot - 6) \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.6.4

Rewrite the expression.

$X = [\begin{array}{c} - 1 & 6 \\ - 3 & - 1 \cdot - 6 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.7

Multiply $- 1$ by $- 6$ .

$X = [\begin{array}{c} - 1 & 6 \\ - 3 & 6 \\ - \frac{1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.8

Cancel the common factor of $5$ .

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Step 4.5.8.1

Move the leading negative in $- \frac{1}{5}$ into the numerator.

$X = [\begin{array}{c} - 1 & 6 \\ - 3 & 6 \\ \frac{- 1}{5} \cdot - 15 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.8.2

Factor $5$ out of $- 15$ .

$X = [\begin{array}{c} - 1 & 6 \\ - 3 & 6 \\ \frac{- 1}{5} \cdot (5 (- 3)) & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.8.3

Cancel the common factor.

$X = [\begin{array}{c} - 1 & 6 \\ - 3 & 6 \\ \frac{- 1}{5} \cdot (5 \cdot - 3) & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.8.4

Rewrite the expression.

$X = [\begin{array}{c} - 1 & 6 \\ - 3 & 6 \\ - 1 \cdot - 3 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.9

Multiply $- 1$ by $- 3$ .

$X = [\begin{array}{c} - 1 & 6 \\ - 3 & 6 \\ 3 & - \frac{1}{5} \cdot - 5 \end{array}]$

Step 4.5.10

Cancel the common factor of $5$ .

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Step 4.5.10.1

Move the leading negative in $- \frac{1}{5}$ into the numerator.

$X = [\begin{array}{c} - 1 & 6 \\ - 3 & 6 \\ 3 & \frac{- 1}{5} \cdot - 5 \end{array}]$

Step 4.5.10.2

Factor $5$ out of $- 5$ .

$X = [\begin{array}{c} - 1 & 6 \\ - 3 & 6 \\ 3 & \frac{- 1}{5} \cdot (5 (- 1)) \end{array}]$

Step 4.5.10.3

Cancel the common factor.

$X = [\begin{array}{c} - 1 & 6 \\ - 3 & 6 \\ 3 & \frac{- 1}{5} \cdot (5 \cdot - 1) \end{array}]$

Step 4.5.10.4

Rewrite the expression.

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

Step 4.5.11

Multiply $- 1$ by $- 1$ .

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