Pre-Algebra Examples

$21 - 7 (3 - q)$

Step 1

Simplify each term.

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Step 1.1

Apply the distributive property.

$21 - 7 \cdot 3 - 7 (- q)$

Step 1.2

Multiply $- 7$ by $3$ .

$21 - 21 - 7 (- q)$

Step 1.3

Multiply $- 1$ by $- 7$ .

$21 - 21 + 7 q$

$21 - 21 + 7 q$

Step 2

Simplify by subtracting numbers.

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Step 2.1

Subtract $21$ from $21$ .

$0 + 7 q$

Step 2.2

Add $0$ and $7 q$ .

$7 q$

$7 q$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$