-9+2r=-3

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Solution for -9+2r=-3 equation: 



-9+2r=-3

We move all terms to the left:

-9+2r-(-3)=0

We add all the numbers together, and all the variables

2r-6=0

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

2r=6

r=6/2

r=3

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