-2+r=12+3r

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Solution for -2+r=12+3r equation: 



-2+r=12+3r

We move all terms to the left:

-2+r-(12+3r)=0

We add all the numbers together, and all the variables

r-(3r+12)-2=0

We get rid of parentheses

r-3r-12-2=0

We add all the numbers together, and all the variables

-2r-14=0

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

-2r=14

r=14/-2

r=-7

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