Pre-Algebra Examples

$3 (7 x - 9)$

Step 1

Apply the distributive property.

$3 (7 x) + 3 \cdot - 9$

Step 2

Multiply.

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Step 2.1

Multiply $7$ by $3$ .

$21 x + 3 \cdot - 9$

Step 2.2

Multiply $3$ by $- 9$ .

$21 x - 27$

$21 x - 27$

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