8u=72-u

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Solution for 8u=72-u equation: 



8u=72-u

We move all terms to the left:

8u-(72-u)=0

We add all the numbers together, and all the variables

8u-(-1u+72)=0

We get rid of parentheses

8u+1u-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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