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.
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too long solution yaar.......
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