U took 5u + 8 p which resemble original or total - at first. Next u took 4u + 11p which is the figure afrer changes in percetage..How can they be equal? Pls advise .tks

You have to read the question carefully. It already says that on Monday, 2001 people attended the conference. And, the number of people attending the conference was the same each day.

So it follows that the number of people who attended the conference on Tuesday is also 2001.

The question is basically saying on Tuesday, the number of men attending decreased and the number of women decreased, but the total number stays the same at 2001 people.


So 5u + 8p = 4u + 11p. If you're unconvinced, find the value of 1unit from his working. Add up the total on both sides of the equation and you'll see that you get 2001 for both sides