-20=24+-2u

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Solution for -20=24+-2u equation: 



-20=24+-2u

We move all terms to the left:

-20-(24+-2u)=0

We add all the numbers together, and all the variables

-(-2u)-20=0

We get rid of parentheses

2u-20=0

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

2u=20

u=20/2

u=10

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