281=210-u

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Solution for 281=210-u equation: 



281=210-u

We move all terms to the left:

281-(210-u)=0

We add all the numbers together, and all the variables

-(-1u+210)+281=0

We get rid of parentheses

1u-210+281=0

We add all the numbers together, and all the variables

u+71=0

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

u=-71

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