9r-5r+4=7r+4-r

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Solution for 9r-5r+4=7r+4-r equation: 



9r-5r+4=7r+4-r

We move all terms to the left:

9r-5r+4-(7r+4-r)=0

We add all the numbers together, and all the variables

9r-5r-(6r+4)+4=0

We add all the numbers together, and all the variables

4r-(6r+4)+4=0

We get rid of parentheses

4r-6r-4+4=0

We add all the numbers together, and all the variables

-2r=0

r=0/-2

r=0

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