20+7s=-3(2s-7)*

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Solution for 20+7s=-3(2s-7)* equation: 



20+7s=-3(2s-7)*

We move all terms to the left:

20+7s-(-3(2s-7)*)=0



We calculate terms in parentheses: -(-3(2s-7)*), so:

-3(2s-7)*

We multiply parentheses

-6s+21

Back to the equation:

-(-6s+21)



We get rid of parentheses

7s+6s-21+20=0

We add all the numbers together, and all the variables

13s-1=0

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

13s=1

s=1/13

s=1/13

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