Question

Ramola has bought 5 chocolates Nd 7candies together ehich cost rs 50.Her friend Varudhini bought 9 chocolates and 5 candies could cost rs 46.Find the cost of 1 candy and 1 chocolate
(from the chapter quadratic equations )​

Answer 1

Answer:

1 chocolate is Rs 1.9

1 candy is Rs 5.8

Step-by-step explanation:

$(5x + 7y = 50) \times 5 \\(9x + 5y = 46) \times 7 \\ \\ 25x + 35y = 250 - \\ - (63x + 35y = 322) \\ = \\ - 38x = - 72 \\ x = 1.9 \\ 5 \times 1.9 + 7y = 50 \\ 7y = 50 - 9.5 \\ y = 40.5 \div 7 \\ y = 5.8$