14u-7u=21

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Solution for 14u-7u=21 equation: 



14u-7u=21

We move all terms to the left:

14u-7u-(21)=0

We add all the numbers together, and all the variables

7u-21=0

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

7u=21

u=21/7

u=3

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