Question

five books and two pencils cost 79ruppes .but two books and five pencils cost 40 ruppes .what is the total cost of one book and one pencil

Answer 1

here is your answer of questions

Answer 2

Let the number of books be 'b' and pencils be 'p'.

5 books and 2 pencils cost ₹79

i.e. 5b+2p = 79

2 books and 5 pencils cost ₹40

i.e. 2b+5p = 40

On solving the two equations we get

b = 15 and p = 2

One book cost ₹15 and one pencil cost ₹2.