Question

By selling a watch for Rs 4500, a dealer losses 10percent . At what price should be sell it so as to gain 10 percen​

Answer 1

$x - x \div 10 = 4500 \\ 10x - x \div 10 = 4500 \\ x = 4500 \times 10 \div 9 \\ x = 5000$

10%of 5000 is 500

so SP is 5000+500=5500