3(4r-1)=45

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Solution for 3(4r-1)=45 equation: 



3(4r-1)=45

We move all terms to the left:

3(4r-1)-(45)=0

We multiply parentheses

12r-3-45=0

We add all the numbers together, and all the variables

12r-48=0

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

12r=48

r=48/12

r=4

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