80=4s-2(10+s)

Solution for 80=4s-2(10+s) equation:

80=4s-2(10+s)

We move all terms to the left:

80-(4s-2(10+s))=0

We add all the numbers together, and all the variables

-(4s-2(s+10))+80=0


We calculate terms in parentheses: -(4s-2(s+10)), so:

4s-2(s+10)

We multiply parentheses

4s-2s-20

We add all the numbers together, and all the variables

2s-20

Back to the equation:

-(2s-20)


We get rid of parentheses

-2s+20+80=0

We add all the numbers together, and all the variables

-2s+100=0

We move all terms containing s to the left, all other terms to the right

-2s=-100

s=-100/-2

s=+50