Question

You bought a pen and three refills for rupees 25 and your friend wbought 2 pens and a refill for rupees 25. Try to represent the solution as equations. Can you find the cost of a pen and a refill separately?

Answer 1

Let a and b denote pen and refill respectively.

then,

a+3b = 25

and

2a+b = 25

by solving the above equations by elimination method we will get as, a=10 and b=5.

so the cost of a pen = 10 and cost of refill = 5