6r-(2r-27)=21

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Solution for 6r-(2r-27)=21 equation: 



6r-(2r-27)=21

We move all terms to the left:

6r-(2r-27)-(21)=0

We get rid of parentheses

6r-2r+27-21=0

We add all the numbers together, and all the variables

4r+6=0

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

4r=-6

r=-6/4

r=-1+1/2

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