6=3(r-9)-12

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Solution for 6=3(r-9)-12 equation: 



6=3(r-9)-12

We move all terms to the left:

6-(3(r-9)-12)=0



We calculate terms in parentheses: -(3(r-9)-12), so:

3(r-9)-12

We multiply parentheses

3r-27-12

We add all the numbers together, and all the variables

3r-39

Back to the equation:

-(3r-39)



We get rid of parentheses

-3r+39+6=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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