3u/7u=21

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Solution for 3u/7u=21 equation: 



3u/7u=21

We move all terms to the left:

3u/7u-(21)=0



Domain of the equation: 7u!=0

u!=0/7

u!=0

u∈R



We multiply all the terms by the denominator


3u-21*7u=0

Wy multiply elements

3u-147u=0

We add all the numbers together, and all the variables

-144u=0

u=0/-144

u=0

Równanie nie ma rozwiązania

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