R-39=-7(3r-7)

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Solution for R-39=-7(3r-7) equation: 



-39=-7(3R-7)

We move all terms to the left:

-39-(-7(3R-7))=0



We calculate terms in parentheses: -(-7(3R-7)), so:

-7(3R-7)

We multiply parentheses

-21R+49

Back to the equation:

-(-21R+49)



We get rid of parentheses

21R-49-39=0

We add all the numbers together, and all the variables

21R-88=0

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

21R=88

R=88/21

R=4+4/21

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