-3r=-4r-9

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Solution for -3r=-4r-9 equation: 



-3r=-4r-9

We move all terms to the left:

-3r-(-4r-9)=0

We get rid of parentheses

-3r+4r+9=0

We add all the numbers together, and all the variables

r+9=0

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

r=-9

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