3r+2r=-12-r

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Solution for 3r+2r=-12-r equation: 



3r+2r=-12-r

We move all terms to the left:

3r+2r-(-12-r)=0

We add all the numbers together, and all the variables

3r+2r-(-1r-12)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

5r+1r+12=0

We add all the numbers together, and all the variables

6r+12=0

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

6r=-12

r=-12/6

r=-2

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