-3s-7+4=15

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Solution for -3s-7+4=15 equation: 



-3s-7+4=15

We move all terms to the left:

-3s-7+4-(15)=0

We add all the numbers together, and all the variables

-3s-18=0

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

-3s=18

s=18/-3

s=-6

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