4=4-2s-7s

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Solution for 4=4-2s-7s equation: 



4=4-2s-7s

We move all terms to the left:

4-(4-2s-7s)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

9s-4+4=0

We add all the numbers together, and all the variables

9s=0

s=0/9

s=0

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