-2(-2r-4)=-12

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Solution for -2(-2r-4)=-12 equation: 



-2(-2r-4)=-12

We move all terms to the left:

-2(-2r-4)-(-12)=0

We add all the numbers together, and all the variables

-2(-2r-4)+12=0

We multiply parentheses

4r+8+12=0

We add all the numbers together, and all the variables

4r+20=0

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

4r=-20

r=-20/4

r=-5

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