3(r+3)=45

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Solution for 3(r+3)=45 equation: 



3(r+3)=45

We move all terms to the left:

3(r+3)-(45)=0

We multiply parentheses

3r+9-45=0

We add all the numbers together, and all the variables

3r-36=0

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

3r=36

r=36/3

r=12

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