3(3r-4)=8-r

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Solution for 3(3r-4)=8-r equation: 



3(3r-4)=8-r

We move all terms to the left:

3(3r-4)-(8-r)=0

We add all the numbers together, and all the variables

3(3r-4)-(-1r+8)=0

We multiply parentheses

9r-(-1r+8)-12=0

We get rid of parentheses

9r+1r-8-12=0

We add all the numbers together, and all the variables

10r-20=0

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

10r=20

r=20/10

r=2

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