4=7/9+u

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Solution for 4=7/9+u equation: 



4=7/9+u

We move all terms to the left:

4-(7/9+u)=0



Domain of the equation: 9+u)!=0

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

u)!=-9

u!=-9/1

u!=-9

u∈R



We add all the numbers together, and all the variables

-(+u+7/9)+4=0

We get rid of parentheses

-u+4-7/9=0

We multiply all the terms by the denominator


-u*9-7+4*9=0

We add all the numbers together, and all the variables

-u*9+29=0

Wy multiply elements

-9u+29=0

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

-9u=-29

u=-29/-9

u=3+2/9

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