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

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



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

We move all terms to the left:

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



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

-4u+2(u-4)

We multiply parentheses

-4u+2u-8

We add all the numbers together, and all the variables

-2u-8

Back to the equation:

-(-2u-8)



We get rid of parentheses

2u+8-20=0

We add all the numbers together, and all the variables

2u-12=0

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

2u=12

u=12/2

u=6

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