9s-7s+s-3=12

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Solution for 9s-7s+s-3=12 equation: 



9s-7s+s-3=12

We move all terms to the left:

9s-7s+s-3-(12)=0

We add all the numbers together, and all the variables

3s-15=0

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

3s=15

s=15/3

s=5

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