2r-12=r-8

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



2r-12=r-8

We move all terms to the left:

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

We get rid of parentheses

2r-r+8-12=0

We add all the numbers together, and all the variables

r-4=0

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

r=4

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