84=8u+28

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Solution for 84=8u+28 equation: 



84=8u+28

We move all terms to the left:

84-(8u+28)=0

We get rid of parentheses

-8u-28+84=0

We add all the numbers together, and all the variables

-8u+56=0

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

-8u=-56

u=-56/-8

u=+7

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