3(-2r+4)-4r-2=-20

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Solution for 3(-2r+4)-4r-2=-20 equation: 



3(-2r+4)-4r-2=-20

We move all terms to the left:

3(-2r+4)-4r-2-(-20)=0

We add all the numbers together, and all the variables

-4r+3(-2r+4)+18=0

We multiply parentheses

-4r-6r+12+18=0

We add all the numbers together, and all the variables

-10r+30=0

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

-10r=-30

r=-30/-10

r=+3

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