15=3+2s

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Solution for 15=3+2s equation: 



15=3+2s

We move all terms to the left:

15-(3+2s)=0

We add all the numbers together, and all the variables

-(2s+3)+15=0

We get rid of parentheses

-2s-3+15=0

We add all the numbers together, and all the variables

-2s+12=0

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

-2s=-12

s=-12/-2

s=+6

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