Algebra Examples

$5 x - [\begin{array}{c} 1.5 & - 3.6 \\ - 0.3 & 2.8 \end{array}] = [\begin{array}{c} 0.2 & 1.3 \\ - 5.6 & 1.7 \end{array}]$

Step 1

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

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Step 1.1

Add $[\begin{array}{c} 1.5 & - 3.6 \\ - 0.3 & 2.8 \end{array}]$ to both sides of the equation.

$5 x = [\begin{array}{c} 0.2 & 1.3 \\ - 5.6 & 1.7 \end{array}] + [\begin{array}{c} 1.5 & - 3.6 \\ - 0.3 & 2.8 \end{array}]$

Step 2

Simplify the right side.

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Step 2.1

Add the corresponding elements.

$5 x = [\begin{array}{c} 0.2 + 1.5 & 1.3 - 3.6 \\ - 5.6 - 0.3 & 1.7 + 2.8 \end{array}]$

Step 2.2

Simplify each element.

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Step 2.2.1

Add $0.2$ and $1.5$ .

$5 x = [\begin{array}{c} 1.7 & 1.3 - 3.6 \\ - 5.6 - 0.3 & 1.7 + 2.8 \end{array}]$

Step 2.2.2

Subtract $3.6$ from $1.3$ .

$5 x = [\begin{array}{c} 1.7 & - 2.3 \\ - 5.6 - 0.3 & 1.7 + 2.8 \end{array}]$

Step 2.2.3

Subtract $0.3$ from $- 5.6$ .

$5 x = [\begin{array}{c} 1.7 & - 2.3 \\ - 5.9 & 1.7 + 2.8 \end{array}]$

Step 2.2.4

Add $1.7$ and $2.8$ .

$5 x = [\begin{array}{c} 1.7 & - 2.3 \\ - 5.9 & 4.5 \end{array}]$

Step 3

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

$\frac{1}{5} (5 x) = \frac{1}{5} [\begin{array}{c} 1.7 & - 2.3 \\ - 5.9 & 4.5 \end{array}]$

Step 4

Simplify.

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Step 4.1

Cancel the common factor of $5$ .

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Step 4.1.1

Factor $5$ out of $5 x$ .

$\frac{1}{5} (5 (x)) = \frac{1}{5} [\begin{array}{c} 1.7 & - 2.3 \\ - 5.9 & 4.5 \end{array}]$

Step 4.1.2

Cancel the common factor.

$\frac{1}{5} (5 x) = \frac{1}{5} [\begin{array}{c} 1.7 & - 2.3 \\ - 5.9 & 4.5 \end{array}]$

Step 4.1.3

Rewrite the expression.

$x = \frac{1}{5} [\begin{array}{c} 1.7 & - 2.3 \\ - 5.9 & 4.5 \end{array}]$

Step 4.2

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

$x = [\begin{array}{c} \frac{1}{5} \cdot 1.7 & \frac{1}{5} \cdot - 2.3 \\ \frac{1}{5} \cdot - 5.9 & \frac{1}{5} \cdot 4.5 \end{array}]$

Step 4.3

Simplify each element in the matrix.

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Step 4.3.1

Combine $\frac{1}{5}$ and $1.7$ .

$x = [\begin{array}{c} \frac{1.7}{5} & \frac{1}{5} \cdot - 2.3 \\ \frac{1}{5} \cdot - 5.9 & \frac{1}{5} \cdot 4.5 \end{array}]$

Step 4.3.2

Divide $1.7$ by $5$ .

$x = [\begin{array}{c} 0.34 & \frac{1}{5} \cdot - 2.3 \\ \frac{1}{5} \cdot - 5.9 & \frac{1}{5} \cdot 4.5 \end{array}]$

Step 4.3.3

Combine $\frac{1}{5}$ and $- 2.3$ .

$x = [\begin{array}{c} 0.34 & \frac{- 2.3}{5} \\ \frac{1}{5} \cdot - 5.9 & \frac{1}{5} \cdot 4.5 \end{array}]$

Step 4.3.4

Divide $- 2.3$ by $5$ .

$x = [\begin{array}{c} 0.34 & - 0.46 \\ \frac{1}{5} \cdot - 5.9 & \frac{1}{5} \cdot 4.5 \end{array}]$

Step 4.3.5

Combine $\frac{1}{5}$ and $- 5.9$ .

$x = [\begin{array}{c} 0.34 & - 0.46 \\ \frac{- 5.9}{5} & \frac{1}{5} \cdot 4.5 \end{array}]$

Step 4.3.6

Divide $- 5.9$ by $5$ .

$x = [\begin{array}{c} 0.34 & - 0.46 \\ - 1.18 & \frac{1}{5} \cdot 4.5 \end{array}]$

Step 4.3.7

Combine $\frac{1}{5}$ and $4.5$ .

$x = [\begin{array}{c} 0.34 & - 0.46 \\ - 1.18 & \frac{4.5}{5} \end{array}]$

Step 4.3.8

Divide $4.5$ by $5$ .

$x = [\begin{array}{c} 0.34 & - 0.46 \\ - 1.18 & 0.9 \end{array}]$