3r-(2r+)=21

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



3r-(2r+)=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

3r-2r-21=0

We add all the numbers together, and all the variables

r-21=0

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

r=21

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