s=7+2s

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Solution for s=7+2s equation: 



s=7+2s

We move all terms to the left:

s-(7+2s)=0

We add all the numbers together, and all the variables

s-(2s+7)=0

We get rid of parentheses

s-2s-7=0

We add all the numbers together, and all the variables

-1s-7=0

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

-s=7

s=7/-1

s=-7

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