207=139-u

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Solution for 207=139-u equation: 



207=139-u

We move all terms to the left:

207-(139-u)=0

We add all the numbers together, and all the variables

-(-1u+139)+207=0

We get rid of parentheses

1u-139+207=0

We add all the numbers together, and all the variables

u+68=0

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

u=-68

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