4r-9=11+2r

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Solution for 4r-9=11+2r equation: 



4r-9=11+2r

We move all terms to the left:

4r-9-(11+2r)=0

We add all the numbers together, and all the variables

4r-(2r+11)-9=0

We get rid of parentheses

4r-2r-11-9=0

We add all the numbers together, and all the variables

2r-20=0

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

2r=20

r=20/2

r=10

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