2R=2r+18

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Solution for 2R=2r+18 equation: 



2=2R+18

We move all terms to the left:

2-(2R+18)=0

We get rid of parentheses

-2R-18+2=0

We add all the numbers together, and all the variables

-2R-16=0

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

-2R=16

R=16/-2

R=-8

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