5R-r=2r

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Solution for 5R-r=2r equation: 



5-R=2R

We move all terms to the left:

5-R-(2R)=0

We add all the numbers together, and all the variables

-3R+5=0

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

-3R=-5

R=-5/-3

R=1+2/3

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