# How do you use the distributive property to simplify -3(s-7)?

Jun 19, 2017

See explanation.

#### Explanation:

To simplify such expression you have to multiply $- 3$ by all terms in the parenethesis:

$- 3 \cdot \left(s - 7\right) = - 3 \cdot s - 7 \cdot \left(- 3\right) = - 3 s + 21$

Jun 19, 2017

$\textcolor{red}{- 3} \left(x - 7\right) \implies \left(\textcolor{red}{- 3} \times x\right) - \left(\textcolor{red}{- 3} \times 7\right) \implies - 3 x - \left(- 21\right) \implies$
$- 3 x + 21$