7r-12=5r+8

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Solution for 7r-12=5r+8 equation: 



7r-12=5r+8

We move all terms to the left:

7r-12-(5r+8)=0

We get rid of parentheses

7r-5r-8-12=0

We add all the numbers together, and all the variables

2r-20=0

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

2r=20

r=20/2

r=10

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