-5r-2r=12-3r

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Solution for -5r-2r=12-3r equation: 



-5r-2r=12-3r

We move all terms to the left:

-5r-2r-(12-3r)=0

We add all the numbers together, and all the variables

-5r-2r-(-3r+12)=0

We add all the numbers together, and all the variables

-7r-(-3r+12)=0

We get rid of parentheses

-7r+3r-12=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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