5-8u=21

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Solution for 5-8u=21 equation: 



5-8u=21

We move all terms to the left:

5-8u-(21)=0

We add all the numbers together, and all the variables

-8u-16=0

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

-8u=16

u=16/-8

u=-2

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