7r-12=-r+12

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



7r-12=-r+12

We move all terms to the left:

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

We add all the numbers together, and all the variables

7r-(-1r+12)-12=0

We get rid of parentheses

7r+1r-12-12=0

We add all the numbers together, and all the variables

8r-24=0

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

8r=24

r=24/8

r=3

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