2r/3=3r-21

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Solution for 2r/3=3r-21 equation: 



2r/3=3r-21

We move all terms to the left:

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

We get rid of parentheses

2r/3-3r+21=0

We multiply all the terms by the denominator


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

We add all the numbers together, and all the variables

2r-3r*3+63=0

Wy multiply elements

2r-9r+63=0

We add all the numbers together, and all the variables

-7r+63=0

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

-7r=-63

r=-63/-7

r=+9

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