This question has been taken from Book:- ML aggarwal, Avichal publication, class10th, quadratic equation in one variable, chapter 5, exercise 5.5

This is an important ques and asked in 1999

A trader buys x articles for a total cost of Rs. 600. (i) Write down the cost of one article in terms of x. If the cost per article were Rs. 5 more, the number of articles that can be bought for Rs. 600 would be four less. (ii) Write down the equation in x for the above situation and solve it to find x.

Question no. 36, ML Aggarwal, chapter 5, exercise 5.5, quadratic equation in one variable, ICSE board,

Total cost = Rs. 600,

No. of articles = x