s-15=3s-87

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Solution for s-15=3s-87 equation: 



s-15=3s-87

We move all terms to the left:

s-15-(3s-87)=0

We get rid of parentheses

s-3s+87-15=0

We add all the numbers together, and all the variables

-2s+72=0

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

-2s=-72

s=-72/-2

s=+36

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