R-7r+12=-72

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Solution for R-7r+12=-72 equation: 



-7R+12=-72

We move all terms to the left:

-7R+12-(-72)=0

We add all the numbers together, and all the variables

-7R+84=0

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

-7R=-84

R=-84/-7

R=+12

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