45=5(r-75)

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Solution for 45=5(r-75) equation: 



45=5(r-75)

We move all terms to the left:

45-(5(r-75))=0



We calculate terms in parentheses: -(5(r-75)), so:

5(r-75)

We multiply parentheses

5r-375

Back to the equation:

-(5r-375)



We get rid of parentheses

-5r+375+45=0

We add all the numbers together, and all the variables

-5r+420=0

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

-5r=-420

r=-420/-5

r=+84

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