13r-31=2r-9

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Solution for 13r-31=2r-9 equation:



13r-31=2r-9
We move all terms to the left:
13r-31-(2r-9)=0
We get rid of parentheses
13r-2r+9-31=0
We add all the numbers together, and all the variables
11r-22=0
We move all terms containing r to the left, all other terms to the right
11r=22
r=22/11
r=2

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