-20=-2(4-x)

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Solution for -20=-2(4-x) equation: 



-20=-2(4-x)

We move all terms to the left:

-20-(-2(4-x))=0

We add all the numbers together, and all the variables

-(-2(-1x+4))-20=0



We calculate terms in parentheses: -(-2(-1x+4)), so:

-2(-1x+4)

We multiply parentheses

2x-8

Back to the equation:

-(2x-8)



We get rid of parentheses

-2x+8-20=0

We add all the numbers together, and all the variables

-2x-12=0

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

-2x=12

x=12/-2

x=-6

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