Question

A lady has only 2 rupee and 2 rupee coin in her purse .if in all she has50 coins totalling70 rupees find the number of coins of each type​

Answer 1

Answer:

1 re coin = 30

2 re coin = 20

Step-by-step explanation:

let 1 re coin be x

2 re coin be y

total number of coins

x + y = 50. equ (1)

total amount is 70

1x + 2y = 70. equ (2)

(2) - (1)

x + 2y = 70

x + y. = 50

we get

y = 20

substitute in equ (1)

x + 20 = 50

x = 50 - 20

x = 30