9=4+u/3

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Solution for 9=4+u/3 equation: 



9=4+u/3

We move all terms to the left:

9-(4+u/3)=0

We add all the numbers together, and all the variables

-(u/3+4)+9=0

We get rid of parentheses

-u/3-4+9=0

We multiply all the terms by the denominator


-u-4*3+9*3=0

We add all the numbers together, and all the variables

-1u+15=0

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

-u=-15

u=-15/-1

u=+15

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