80=8(r+5)

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Solution for 80=8(r+5) equation: 



80=8(r+5)

We move all terms to the left:

80-(8(r+5))=0



We calculate terms in parentheses: -(8(r+5)), so:

8(r+5)

We multiply parentheses

8r+40

Back to the equation:

-(8r+40)



We get rid of parentheses

-8r-40+80=0

We add all the numbers together, and all the variables

-8r+40=0

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

-8r=-40

r=-40/-8

r=+5

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