72=6(3+r)

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Solution for 72=6(3+r) equation: 



72=6(3+r)

We move all terms to the left:

72-(6(3+r))=0

We add all the numbers together, and all the variables

-(6(r+3))+72=0



We calculate terms in parentheses: -(6(r+3)), so:

6(r+3)

We multiply parentheses

6r+18

Back to the equation:

-(6r+18)



We get rid of parentheses

-6r-18+72=0

We add all the numbers together, and all the variables

-6r+54=0

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

-6r=-54

r=-54/-6

r=+9

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