s-s+2s+5s=7

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Solution for s-s+2s+5s=7 equation: 



s-s+2s+5s=7

We move all terms to the left:

s-s+2s+5s-(7)=0

We add all the numbers together, and all the variables

7s-7=0

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

7s=7

s=7/7

s=1

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