Simplify -7r-2(-4-9r)

$- 7 r - 2 (- 4 - 9 r)$

Step 1

Simplify each term.

Apply the distributive property.

$- 7 r - 2 \cdot - 4 - 2 (- 9 r)$

Multiply $- 2$ by $- 4$ .

$- 7 r + 8 - 2 (- 9 r)$

Multiply $- 9$ by $- 2$ .

$- 7 r + 8 + 18 r$

$- 7 r + 8 + 18 r$

Step 2

Add $- 7 r$ and $18 r$ .

$11 r + 8$

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