Question

a video of ex 4.2 question in cbse math textbook which i saw said that in question f zby 3 and 5 by 4 is equal and they should both be multiplied by three and video said that z by 3 should be multiplied by 3 and the cancelled 3 because denomintor and number multiplied is same. why is that so. my only doubt is how can 3 be cancelled cuz denomiantor and number multiplied should be same.

Answer 1

Answer:

too long solution yaar.......