4-7s=9s+20

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Solution for 4-7s=9s+20 equation: 



4-7s=9s+20

We move all terms to the left:

4-7s-(9s+20)=0

We get rid of parentheses

-7s-9s-20+4=0

We add all the numbers together, and all the variables

-16s-16=0

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

-16s=16

s=16/-16

s=-1

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