12(r-1)=7r

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Solution for 12(r-1)=7r equation: 



12(r-1)=7r

We move all terms to the left:

12(r-1)-(7r)=0

We add all the numbers together, and all the variables

-7r+12(r-1)=0

We multiply parentheses

-7r+12r-12=0

We add all the numbers together, and all the variables

5r-12=0

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

5r=12

r=12/5

r=2+2/5

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