-12=-2r+5r

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Solution for -12=-2r+5r equation: 



-12=-2r+5r

We move all terms to the left:

-12-(-2r+5r)=0

We add all the numbers together, and all the variables

-(+3r)-12=0

We get rid of parentheses

-3r-12=0

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

-3r=12

r=12/-3

r=-4

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