Question

Q.Sudha has rupees 45 in the form of rupees 1and 50 paise coins. If she has 70 coins in all, find the number of coins of each denomination.​

Answer 1

x= no of 1rupee coins

y=no. of 50p coins

x+1/2y=45

x+y=70

(-)

-1/2y=25

y=2(25)

y=50

x=70-y

x=20