-8r=8-7r

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Solution for -8r=8-7r equation: 



-8r=8-7r

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-8r+7r-8=0

We add all the numbers together, and all the variables

-1r-8=0

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

-r=8

r=8/-1

r=-8

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