# How do you solve 13s + - 11s - (- 18)= 6?

Mar 14, 2018

Combine like-terms and get $s$ by itself.
The final answer is $s = - 6$

#### Explanation:

1) distribute the negative into the parenthesis $\left(- 18\right)$

$13 s + - 11 s - - 18 = 6$

2) Change the 'double negative' to a positive.

$13 s + - 11 s + 18 = 6$

3) Combine 'like term', which means you can add $13 s$ and $- 11 s$.

$2 s + 18 = 6$

4) subtract $18$ from both sides, in order to get the variable $s$ by itself.

$2 s + 18 - 18 = 6 - 18$

$2 s = - 12$

5) divide each side by 2, in order to solve for $s$.

$\frac{2 s}{2} = \frac{- 12}{2}$

$s = - 6$ <-- final answer