-9r=-117

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Solution for -9r=-117 equation: 



-9r=-117

We move all terms to the left:

-9r-(-117)=0

We add all the numbers together, and all the variables

-9r+117=0

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

-9r=-117

r=-117/-9

r=+13

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