u+72=9u

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Solution for u+72=9u equation: 



u+72=9u

We move all terms to the left:

u+72-(9u)=0

We add all the numbers together, and all the variables

-8u+72=0

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

-8u=-72

u=-72/-8

u=+9

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