80=5(1+5a)

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Solution for 80=5(1+5a) equation: 



80=5(1+5a)

We move all terms to the left:

80-(5(1+5a))=0

We add all the numbers together, and all the variables

-(5(5a+1))+80=0



We calculate terms in parentheses: -(5(5a+1)), so:

5(5a+1)

We multiply parentheses

25a+5

Back to the equation:

-(25a+5)



We get rid of parentheses

-25a-5+80=0

We add all the numbers together, and all the variables

-25a+75=0

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

-25a=-75

a=-75/-25

a=+3

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