-20=2(u-3)-4u

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Solution for -20=2(u-3)-4u equation: 



-20=2(u-3)-4u

We move all terms to the left:

-20-(2(u-3)-4u)=0



We calculate terms in parentheses: -(2(u-3)-4u), so:

2(u-3)-4u

We add all the numbers together, and all the variables

-4u+2(u-3)

We multiply parentheses

-4u+2u-6

We add all the numbers together, and all the variables

-2u-6

Back to the equation:

-(-2u-6)



We get rid of parentheses

2u+6-20=0

We add all the numbers together, and all the variables

2u-14=0

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

2u=14

u=14/2

u=7

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