Question

I have some 5- rupee coins and some 2 -rupee coins. The number of 2 -rupee coins is 4 times that of the 5 rupee coins. If I have ₹117 in all, find the number of coins of each denominators.

Answer 1

Answer:

x = 9

y = 36

Step-by-step explanation:

Let no. of 5-rupee coin be x

no. of 2-rupee coin be y

A/q

5x + 2y = 117. ............(1)

Also,

4x = y

4x - y = 0. ................(2)

Multiplying ek (2) by 2 , then adding (1) &(2)

5x + 2y = 117

8x - 2y = 117

=>13x = 117

=> x = 117/13

= x =9

therefore, y = 4x

y = 4×9

y= 36