12+7s=20

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Solution for 12+7s=20 equation: 



12+7s=20

We move all terms to the left:

12+7s-(20)=0

We add all the numbers together, and all the variables

7s-8=0

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

7s=8

s=8/7

s=1+1/7

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