-8=7r-3r

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Solution for -8=7r-3r equation: 



-8=7r-3r

We move all terms to the left:

-8-(7r-3r)=0

We add all the numbers together, and all the variables

-(+4r)-8=0

We get rid of parentheses

-4r-8=0

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

-4r=8

r=8/-4

r=-2

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