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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

13r-(-4r)=0

We get rid of parentheses

13r+4r=0

We add all the numbers together, and all the variables

17r=0

r=0/17

r=0

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