1=-9+2u

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Solution for 1=-9+2u equation: 



1=-9+2u

We move all terms to the left:

1-(-9+2u)=0

We add all the numbers together, and all the variables

-(2u-9)+1=0

We get rid of parentheses

-2u+9+1=0

We add all the numbers together, and all the variables

-2u+10=0

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

-2u=-10

u=-10/-2

u=+5

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