s=2(2s-45)

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Solution for s=2(2s-45) equation: 



s=2(2s-45)

We move all terms to the left:

s-(2(2s-45))=0



We calculate terms in parentheses: -(2(2s-45)), so:

2(2s-45)

We multiply parentheses

4s-90

Back to the equation:

-(4s-90)



We get rid of parentheses

s-4s+90=0

We add all the numbers together, and all the variables

-3s+90=0

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

-3s=-90

s=-90/-3

s=+30

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