12-1-5=2r+1

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



12-1-5=2r+1

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(2r+1)+6=0

We get rid of parentheses

-2r-1+6=0

We add all the numbers together, and all the variables

-2r+5=0

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

-2r=-5

r=-5/-2

r=2+1/2

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