This is an important ques from the Book ML Aggarwal class 10th,, chapter – 7, ratio and proportion.
It has been asked in previous year question paper of 2008
In this ques we have been given that
(i) 5x+7y/5u+7v=5x−7y/5u−7v , and we have to apply mathematical operations to prove that x/y=u/v and
(ii) 8a−5b/8c−5d=8a+5b/8c+5d ,and we ahve6to prove that a/b=c/d
Question no. 2, 7.3