-9r=-7r+8

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



-9r=-7r+8

We move all terms to the left:

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

We get rid of parentheses

-9r+7r-8=0

We add all the numbers together, and all the variables

-2r-8=0

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

-2r=8

r=8/-2

r=-4

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