-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-2=0

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

-8r=2

r=2/-8

r=-1/4

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