3(r-15)=12

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Solution for 3(r-15)=12 equation: 



3(r-15)=12

We move all terms to the left:

3(r-15)-(12)=0

We multiply parentheses

3r-45-12=0

We add all the numbers together, and all the variables

3r-57=0

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

3r=57

r=57/3

r=19

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