-45=3(r+71)

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Solution for -45=3(r+71) equation: 



-45=3(r+71)

We move all terms to the left:

-45-(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-213-45=0

We add all the numbers together, and all the variables

-3r-258=0

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

-3r=258

r=258/-3

r=-86

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