3r+6=-r-6

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Solution for 3r+6=-r-6 equation: 



3r+6=-r-6

We move all terms to the left:

3r+6-(-r-6)=0

We add all the numbers together, and all the variables

3r-(-1r-6)+6=0

We get rid of parentheses

3r+1r+6+6=0

We add all the numbers together, and all the variables

4r+12=0

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

4r=-12

r=-12/4

r=-3

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