9u+5u=84

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Solution for 9u+5u=84 equation: 



9u+5u=84

We move all terms to the left:

9u+5u-(84)=0

We add all the numbers together, and all the variables

14u-84=0

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

14u=84

u=84/14

u=6

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