12-5r=2r+1

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Solution for 12-5r=2r+1 equation: 



12-5r=2r+1

We move all terms to the left:

12-5r-(2r+1)=0

We get rid of parentheses

-5r-2r-1+12=0

We add all the numbers together, and all the variables

-7r+11=0

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

-7r=-11

r=-11/-7

r=1+4/7

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