Question

5 books and 7 pens together cost rupees 79 whereas 7 books and 5 pens together cost rupees 77 represent this situation in the form of linear equation in two variables

Answer 1

Answer:

Let no. Of books be =x

Numbers of pen y.

So

5x+7y =79.....eq(1)

7x+5y=77....eq(2)

Answer 2

The sum of two no.is 5 times of its difference.if their difference is 7. then what are the two numbers???