# How do you solve 3s+3(1-s)=s-17?

Jul 12, 2016

$s = 20$

#### Explanation:

Multiply out the bracket on the left hand side to obtain:

$\textcolor{red}{3 s} + 3 - \textcolor{red}{3 s} = s - 17$

The red terms cancel out. Adding 17 to both sides gives:

$20 = s$

and thus our solution has fallen out.