30=2r-r

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Solution for 30=2r-r equation:



30=2r-r
We move all terms to the left:
30-(2r-r)=0
We add all the numbers together, and all the variables
-(+r)+30=0
We get rid of parentheses
-r+30=0
We add all the numbers together, and all the variables
-1r+30=0
We move all terms containing r to the left, all other terms to the right
-r=-30
r=-30/-1
r=+30

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