77=7(s-80)

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Solution for 77=7(s-80) equation: 



77=7(s-80)

We move all terms to the left:

77-(7(s-80))=0



We calculate terms in parentheses: -(7(s-80)), so:

7(s-80)

We multiply parentheses

7s-560

Back to the equation:

-(7s-560)



We get rid of parentheses

-7s+560+77=0

We add all the numbers together, and all the variables

-7s+637=0

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

-7s=-637

s=-637/-7

s=+91

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