289=216-u

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Solution for 289=216-u equation: 



289=216-u

We move all terms to the left:

289-(216-u)=0

We add all the numbers together, and all the variables

-(-1u+216)+289=0

We get rid of parentheses

1u-216+289=0

We add all the numbers together, and all the variables

u+73=0

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

u=-73

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