216=216-u

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Solution for 216=216-u equation: 



216=216-u

We move all terms to the left:

216-(216-u)=0

We add all the numbers together, and all the variables

-(-1u+216)+216=0

We get rid of parentheses

1u-216+216=0

We add all the numbers together, and all the variables

u=0

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