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

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



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

We move all terms to the left:

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



We calculate terms in parentheses: -(-2(r-4)), so:

-2(r-4)

We multiply parentheses

-2r+8

Back to the equation:

-(-2r+8)



We get rid of parentheses

-4r+2r-8+20=0

We add all the numbers together, and all the variables

-2r+12=0

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

-2r=-12

r=-12/-2

r=+6

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