-8r=-7-9r

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Solution for -8r=-7-9r equation: 



-8r=-7-9r

We move all terms to the left:

-8r-(-7-9r)=0

We add all the numbers together, and all the variables

-8r-(-9r-7)=0

We get rid of parentheses

-8r+9r+7=0

We add all the numbers together, and all the variables

r+7=0

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

r=-7

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