7r-4r+2=9r-r

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Solution for 7r-4r+2=9r-r equation: 



7r-4r+2=9r-r

We move all terms to the left:

7r-4r+2-(9r-r)=0

We add all the numbers together, and all the variables

7r-4r-(+8r)+2=0

We add all the numbers together, and all the variables

3r-(+8r)+2=0

We get rid of parentheses

3r-8r+2=0

We add all the numbers together, and all the variables

-5r+2=0

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

-5r=-2

r=-2/-5

r=2/5

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