-12+7r=8+2r

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Solution for -12+7r=8+2r equation: 



-12+7r=8+2r

We move all terms to the left:

-12+7r-(8+2r)=0

We add all the numbers together, and all the variables

7r-(2r+8)-12=0

We get rid of parentheses

7r-2r-8-12=0

We add all the numbers together, and all the variables

5r-20=0

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

5r=20

r=20/5

r=4

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