39=2u+9

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Solution for 39=2u+9 equation: 



39=2u+9

We move all terms to the left:

39-(2u+9)=0

We get rid of parentheses

-2u-9+39=0

We add all the numbers together, and all the variables

-2u+30=0

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

-2u=-30

u=-30/-2

u=+15

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