I have some five-rupee coins and some two-rupee coins. The number of

two-rupee coins is twice the number of five-rupee coins. The total money I have

is 108 rupees. So how many five-rupee coins do I have? And how many

two-rupee coins?

 let number of 5 rupee coins be = x

therefore, 2 rupee coins will be = 2x

total money = rs. 108

therefore, 5x + 4x = 108 ( 5x is because the value of coin is also added )

9x = 108

therefore x = 108/9

so x = 12

so 2x = 24

therefore u have 12 coins of 5 rupee and 24 coins of 2 rupee

hope it will help u.......................