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Example - 4. A person on tour has Rs. 360 for his daily expenses. If he exceeds his tour programme by 4 days, he must cut down his daily expenses by Rs. 3 per day. Find the number of days of his tour programme.

Solution : Let the number of days be x

Extended number of days = x + 4

Amount to be spend = Rs. 360

According to the question

Either x + 24 = 0 or x - 20 = 0

As days are never negative