-20+11u=20+9u

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



-20+11u=20+9u

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

11u-9u-20-20=0

We add all the numbers together, and all the variables

2u-40=0

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

2u=40

u=40/2

u=20

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