-72=8-8r

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Solution for -72=8-8r equation: 



-72=8-8r

We move all terms to the left:

-72-(8-8r)=0

We add all the numbers together, and all the variables

-(-8r+8)-72=0

We get rid of parentheses

8r-8-72=0

We add all the numbers together, and all the variables

8r-80=0

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

8r=80

r=80/8

r=10

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