Question

Three books and a pen cost Rs. 70 and 2 pens and a book cost Rs. 40. How much will a book and a pen cost ?

Answer 1

Answer:

20 and 10

Step-by-step explanation:

Let a book be x and a pen be y, then

3x + y = 70 &,

x + 2y = 40

from above

x = 20 & y = 10