s+2s+s-2=10

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Solution for s+2s+s-2=10 equation: 



s+2s+s-2=10

We move all terms to the left:

s+2s+s-2-(10)=0

We add all the numbers together, and all the variables

4s-12=0

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

4s=12

s=12/4

s=3

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