-12+3r=r+4

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Solution for -12+3r=r+4 equation: 



-12+3r=r+4

We move all terms to the left:

-12+3r-(r+4)=0

We get rid of parentheses

3r-r-4-12=0

We add all the numbers together, and all the variables

2r-16=0

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

2r=16

r=16/2

r=8

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