-3r=-6r-9

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



-3r=-6r-9

We move all terms to the left:

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

We get rid of parentheses

-3r+6r+9=0

We add all the numbers together, and all the variables

3r+9=0

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

3r=-9

r=-9/3

r=-3

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