8u+u=72

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Solution for 8u+u=72 equation: 



8u+u=72

We move all terms to the left:

8u+u-(72)=0

We add all the numbers together, and all the variables

9u-72=0

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

9u=72

u=72/9

u=8

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