7s+9s=-12

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Solution for 7s+9s=-12 equation: 



7s+9s=-12

We move all terms to the left:

7s+9s-(-12)=0

We add all the numbers together, and all the variables

16s+12=0

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

16s=-12

s=-12/16

s=-3/4

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