39=3(r-71)

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Solution for 39=3(r-71) equation: 



39=3(r-71)

We move all terms to the left:

39-(3(r-71))=0



We calculate terms in parentheses: -(3(r-71)), so:

3(r-71)

We multiply parentheses

3r-213

Back to the equation:

-(3r-213)



We get rid of parentheses

-3r+213+39=0

We add all the numbers together, and all the variables

-3r+252=0

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

-3r=-252

r=-252/-3

r=+84

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