-9r+7=13

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Solution for -9r+7=13 equation: 



-9r+7=13

We move all terms to the left:

-9r+7-(13)=0

We add all the numbers together, and all the variables

-9r-6=0

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

-9r=6

r=6/-9

r=-2/3

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