u+7u=16

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Solution for u+7u=16 equation: 



u+7u=16

We move all terms to the left:

u+7u-(16)=0

We add all the numbers together, and all the variables

8u-16=0

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

8u=16

u=16/8

u=2

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