3r+9=-6r

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Solution for 3r+9=-6r equation: 



3r+9=-6r

We move all terms to the left:

3r+9-(-6r)=0

We get rid of parentheses

3r+6r+9=0

We add all the numbers together, and all the variables

9r+9=0

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

9r=-9

r=-9/9

r=-1

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