-9u+20=-11u

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Solution for -9u+20=-11u equation: 



-9u+20=-11u

We move all terms to the left:

-9u+20-(-11u)=0

We get rid of parentheses

-9u+11u+20=0

We add all the numbers together, and all the variables

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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