-4R+7r-3+5r=20-7

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Solution for -4R+7r-3+5r=20-7 equation: 



-4+7R-3+5R=20-7

We move all terms to the left:

-4+7R-3+5R-(20-7)=0

We add all the numbers together, and all the variables

7R+5R-4-3-13=0

We add all the numbers together, and all the variables

12R-20=0

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

12R=20

R=20/12

R=1+2/3

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