4r-55=2r+31

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Solution for 4r-55=2r+31 equation: 



4r-55=2r+31

We move all terms to the left:

4r-55-(2r+31)=0

We get rid of parentheses

4r-2r-31-55=0

We add all the numbers together, and all the variables

2r-86=0

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

2r=86

r=86/2

r=43

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