3r-(12r+1)=21

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Solution for 3r-(12r+1)=21 equation: 



3r-(12r+1)=21

We move all terms to the left:

3r-(12r+1)-(21)=0

We get rid of parentheses

3r-12r-1-21=0

We add all the numbers together, and all the variables

-9r-22=0

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

-9r=22

r=22/-9

r=-2+4/9

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