7u/4=21

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Solution for 7u/4=21 equation: 



7u/4=21

We move all terms to the left:

7u/4-(21)=0

We multiply all the terms by the denominator


7u-21*4=0

We add all the numbers together, and all the variables

7u-84=0

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

7u=84

u=84/7

u=12

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