18=7s+2s=

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Solution for 18=7s+2s= equation: 



18=7s+2s=

We move all terms to the left:

18-(7s+2s)=0

We add all the numbers together, and all the variables

-(+9s)+18=0

We get rid of parentheses

-9s+18=0

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

-9s=-18

s=-18/-9

s=+2

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