40+4u=9u

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Solution for 40+4u=9u equation: 



40+4u=9u

We move all terms to the left:

40+4u-(9u)=0

We add all the numbers together, and all the variables

-5u+40=0

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

-5u=-40

u=-40/-5

u=+8

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