78=3(r+11)

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Solution for 78=3(r+11) equation: 



78=3(r+11)

We move all terms to the left:

78-(3(r+11))=0



We calculate terms in parentheses: -(3(r+11)), so:

3(r+11)

We multiply parentheses

3r+33

Back to the equation:

-(3r+33)



We get rid of parentheses

-3r-33+78=0

We add all the numbers together, and all the variables

-3r+45=0

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

-3r=-45

r=-45/-3

r=+15

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