s-13=21s=34

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Solution for s-13=21s=34 equation: 



s-13=21s=34

We move all terms to the left:

s-13-(21s)=0

We add all the numbers together, and all the variables

-20s-13=0

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

-20s=13

s=13/-20

s=-13/20

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