85=5(4a+1)

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Solution for 85=5(4a+1) equation: 



85=5(4a+1)

We move all terms to the left:

85-(5(4a+1))=0



We calculate terms in parentheses: -(5(4a+1)), so:

5(4a+1)

We multiply parentheses

20a+5

Back to the equation:

-(20a+5)



We get rid of parentheses

-20a-5+85=0

We add all the numbers together, and all the variables

-20a+80=0

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

-20a=-80

a=-80/-20

a=+4

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