457=21u-68

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Solution for 457=21u-68 equation: 



457=21u-68

We move all terms to the left:

457-(21u-68)=0

We get rid of parentheses

-21u+68+457=0

We add all the numbers together, and all the variables

-21u+525=0

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

-21u=-525

u=-525/-21

u=+25

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