-72=-2r+10r

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Solution for -72=-2r+10r equation: 



-72=-2r+10r

We move all terms to the left:

-72-(-2r+10r)=0

We add all the numbers together, and all the variables

-(+8r)-72=0

We get rid of parentheses

-8r-72=0

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

-8r=72

r=72/-8

r=-9

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