-2(4r-8)=20

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Solution for -2(4r-8)=20 equation: 



-2(4r-8)=20

We move all terms to the left:

-2(4r-8)-(20)=0

We multiply parentheses

-8r+16-20=0

We add all the numbers together, and all the variables

-8r-4=0

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

-8r=4

r=4/-8

r=-1/2

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