84=3(5r-2)

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Solution for 84=3(5r-2) equation: 



84=3(5r-2)

We move all terms to the left:

84-(3(5r-2))=0



We calculate terms in parentheses: -(3(5r-2)), so:

3(5r-2)

We multiply parentheses

15r-6

Back to the equation:

-(15r-6)



We get rid of parentheses

-15r+6+84=0

We add all the numbers together, and all the variables

-15r+90=0

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

-15r=-90

r=-90/-15

r=+6

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