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

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



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

We move all terms to the left:

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



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

7(r-8)+8r

We add all the numbers together, and all the variables

8r+7(r-8)

We multiply parentheses

8r+7r-56

We add all the numbers together, and all the variables

15r-56

Back to the equation:

-(15r-56)



We get rid of parentheses

7r-15r+56+8=0

We add all the numbers together, and all the variables

-8r+64=0

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

-8r=-64

r=-64/-8

r=+8

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