R+4R-4r=15

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Solution for R+4R-4r=15 equation: 



+4-4R=15

We move all terms to the left:

+4-4R-(15)=0

We add all the numbers together, and all the variables

-4R-11=0

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

-4R=11

R=11/-4

R=-2+3/4

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