257=51-u

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Solution for 257=51-u equation: 



257=51-u

We move all terms to the left:

257-(51-u)=0

We add all the numbers together, and all the variables

-(-1u+51)+257=0

We get rid of parentheses

1u-51+257=0

We add all the numbers together, and all the variables

u+206=0

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

u=-206

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