-20=5r-3r

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Solution for -20=5r-3r equation: 



-20=5r-3r

We move all terms to the left:

-20-(5r-3r)=0

We add all the numbers together, and all the variables

-(+2r)-20=0

We get rid of parentheses

-2r-20=0

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

-2r=20

r=20/-2

r=-10

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