120=8(8+7r)

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Solution for 120=8(8+7r) equation: 



120=8(8+7r)

We move all terms to the left:

120-(8(8+7r))=0

We add all the numbers together, and all the variables

-(8(7r+8))+120=0



We calculate terms in parentheses: -(8(7r+8)), so:

8(7r+8)

We multiply parentheses

56r+64

Back to the equation:

-(56r+64)



We get rid of parentheses

-56r-64+120=0

We add all the numbers together, and all the variables

-56r+56=0

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

-56r=-56

r=-56/-56

r=1

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