100=157-u

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Solution for 100=157-u equation: 



100=157-u

We move all terms to the left:

100-(157-u)=0

We add all the numbers together, and all the variables

-(-1u+157)+100=0

We get rid of parentheses

1u-157+100=0

We add all the numbers together, and all the variables

u-57=0

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

u=57

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