13=11-2/9u

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Solution for 13=11-2/9u equation: 



13=11-2/9u

We move all terms to the left:

13-(11-2/9u)=0



Domain of the equation: 9u)!=0

u!=0/1

u!=0

u∈R



We add all the numbers together, and all the variables

-(-2/9u+11)+13=0

We get rid of parentheses

2/9u-11+13=0

We multiply all the terms by the denominator


-11*9u+13*9u+2=0

Wy multiply elements

-99u+117u+2=0

We add all the numbers together, and all the variables

18u+2=0

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

18u=-2

u=-2/18

u=-1/9

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