R-7=3r+9

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Solution for R-7=3r+9 equation: 



-7=3R+9

We move all terms to the left:

-7-(3R+9)=0

We get rid of parentheses

-3R-9-7=0

We add all the numbers together, and all the variables

-3R-16=0

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

-3R=16

R=16/-3

R=-5+1/3

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