-8r+7=-9

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



-8r+7=-9

We move all terms to the left:

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

We add all the numbers together, and all the variables

-8r+16=0

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

-8r=-16

r=-16/-8

r=+2

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