-9r-7=20

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Solution for -9r-7=20 equation: 



-9r-7=20

We move all terms to the left:

-9r-7-(20)=0

We add all the numbers together, and all the variables

-9r-27=0

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

-9r=27

r=27/-9

r=-3

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