7r+r-2r+2=20

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Solution for 7r+r-2r+2=20 equation: 



7r+r-2r+2=20

We move all terms to the left:

7r+r-2r+2-(20)=0

We add all the numbers together, and all the variables

6r-18=0

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

6r=18

r=18/6

r=3

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