4r+9r-11r+7r=9r

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Solution for 4r+9r-11r+7r=9r equation: 



4r+9r-11r+7r=9r

We move all terms to the left:

4r+9r-11r+7r-(9r)=0

We add all the numbers together, and all the variables

=0

r=0/1

r=0

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