Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

Let no. of Rs 5 notes be x and no. of Rs 10 notes be y Total number of notes is 90 ⇒ x + y = 90 ........(1) Total amount = 500 5x + 10y = 500 ...(2) Multiply equation (1) by 10 10x + 10y = 900 .....(3) Subtract eqution (2) from equation (3) 10x + 10y = 900 5x + 10y = 500 ---------------------- 5x = 400 ----------------------