3s-84=s

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Solution for 3s-84=s equation: 



3s-84=s

We move all terms to the left:

3s-84-(s)=0

We add all the numbers together, and all the variables

2s-84=0

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

2s=84

s=84/2

s=42

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