Algebra Examples

$[\begin{array}{c} 6 & 8 \\ - 11 & 15 \end{array}] - [\begin{array}{c} c + 2 & 3 \\ - 5 & d - 4 \end{array}] = [\begin{array}{c} 22 & 5 \\ - 6 & 17 \end{array}]$

Step 1

Subtract the corresponding elements.

$[\begin{array}{c} 6 - (c + 2) & 8 - 3 \\ - 11 + 5 & 15 - (d - 4) \end{array}] = [\begin{array}{c} 22 & 5 \\ - 6 & 17 \end{array}]$

Step 2

Simplify each element.

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Step 2.1

Simplify each term.

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Step 2.1.1

Apply the distributive property.

$[\begin{array}{c} 6 - c - 1 \cdot 2 & 8 - 3 \\ - 11 + 5 & 15 - (d - 4) \end{array}] = [\begin{array}{c} 22 & 5 \\ - 6 & 17 \end{array}]$

Step 2.1.2

Multiply $- 1$ by $2$ .

$[\begin{array}{c} 6 - c - 2 & 8 - 3 \\ - 11 + 5 & 15 - (d - 4) \end{array}] = [\begin{array}{c} 22 & 5 \\ - 6 & 17 \end{array}]$

Step 2.2

Subtract $2$ from $6$ .

$[\begin{array}{c} - c + 4 & 8 - 3 \\ - 11 + 5 & 15 - (d - 4) \end{array}] = [\begin{array}{c} 22 & 5 \\ - 6 & 17 \end{array}]$

Step 2.3

Subtract $3$ from $8$ .

$[\begin{array}{c} - c + 4 & 5 \\ - 11 + 5 & 15 - (d - 4) \end{array}] = [\begin{array}{c} 22 & 5 \\ - 6 & 17 \end{array}]$

Step 2.4

Add $- 11$ and $5$ .

$[\begin{array}{c} - c + 4 & 5 \\ - 6 & 15 - (d - 4) \end{array}] = [\begin{array}{c} 22 & 5 \\ - 6 & 17 \end{array}]$

Step 2.5

Simplify each term.

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Step 2.5.1

Apply the distributive property.

$[\begin{array}{c} - c + 4 & 5 \\ - 6 & 15 - d - - 4 \end{array}] = [\begin{array}{c} 22 & 5 \\ - 6 & 17 \end{array}]$

Step 2.5.2

Multiply $- 1$ by $- 4$ .

$[\begin{array}{c} - c + 4 & 5 \\ - 6 & 15 - d + 4 \end{array}] = [\begin{array}{c} 22 & 5 \\ - 6 & 17 \end{array}]$

Step 2.6

Add $15$ and $4$ .

$[\begin{array}{c} - c + 4 & 5 \\ - 6 & - d + 19 \end{array}] = [\begin{array}{c} 22 & 5 \\ - 6 & 17 \end{array}]$

Step 3

Write as a linear system of equations.

$- c + 4 = 22$

$5 = 5$

$- 6 = - 6$

$- d + 19 = 17$

Step 4

Since $- 6 = - 6$ is always true, the matrix equation has infinite solutions.

Infinite solutions satisfying the system.