-(2r-3)=-21+6r

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Solution for -(2r-3)=-21+6r equation: 



-(2r-3)=-21+6r

We move all terms to the left:

-(2r-3)-(-21+6r)=0

We add all the numbers together, and all the variables

-(2r-3)-(6r-21)=0

We get rid of parentheses

-2r-6r+3+21=0

We add all the numbers together, and all the variables

-8r+24=0

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

-8r=-24

r=-24/-8

r=+3

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