7r-3r=-r+2r=9

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Solution for 7r-3r=-r+2r=9 equation: 



7r-3r=-r+2r=9

We move all terms to the left:

7r-3r-(-r+2r)=0

We add all the numbers together, and all the variables

7r-3r-(+r)=0

We add all the numbers together, and all the variables

4r-(+r)=0

We get rid of parentheses

4r-r=0

We add all the numbers together, and all the variables

3r=0

r=0/3

r=0

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