Question

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

Answer 1

`s=20`

Explanation:

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

`color(red)(3s) + 3 - color(red)(3s) = s -17`

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

`20 = s`

and thus our solution has fallen out.