20-3s=7s-20

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Solution for 20-3s=7s-20 equation: 



20-3s=7s-20

We move all terms to the left:

20-3s-(7s-20)=0

We get rid of parentheses

-3s-7s+20+20=0

We add all the numbers together, and all the variables

-10s+40=0

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

-10s=-40

s=-40/-10

s=+4

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