12=3(6-6r)-3(4r-8)

Solution for 12=3(6-6r)-3(4r-8) equation:

12=3(6-6r)-3(4r-8)

We move all terms to the left:

12-(3(6-6r)-3(4r-8))=0

We add all the numbers together, and all the variables

-(3(-6r+6)-3(4r-8))+12=0


We calculate terms in parentheses: -(3(-6r+6)-3(4r-8)), so:

3(-6r+6)-3(4r-8)

We multiply parentheses

-18r-12r+18+24

We add all the numbers together, and all the variables

-30r+42

Back to the equation:

-(-30r+42)


We get rid of parentheses

30r-42+12=0

We add all the numbers together, and all the variables

30r-30=0

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

30r=30

r=30/30

r=1