Linear Equation In One Variable

Kusum buys some chocolates at the rate of Rs. 10 per chocolate. She
also buys an equal number of candies at the rate of Rs. 5 per candy.
She makes a 20% profit on chocolates and 8% profit on candies. At
the end of the day, all chocolates and candies are sold out and her
profit is Rs. 240. Find the number of chocolates purchased.