s-7s=18

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Solution for s-7s=18 equation: 



s-7s=18

We move all terms to the left:

s-7s-(18)=0

We add all the numbers together, and all the variables

-6s-18=0

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

-6s=18

s=18/-6

s=-3

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