3(7r-1)=144

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Solution for 3(7r-1)=144 equation: 



3(7r-1)=144

We move all terms to the left:

3(7r-1)-(144)=0

We multiply parentheses

21r-3-144=0

We add all the numbers together, and all the variables

21r-147=0

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

21r=147

r=147/21

r=7

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