Question

1) There are 40 coins in a bag, consisting of $ 5 and $ 2 coins. If the total amount is Rs. 140, how many $ 2 and $ 5 coins are there in the bag?​

Answer 1

Answer:

There are 20 $2 coins and 20 $5 coins

Step-by-step explanation:

Let x be the number of $2 coins and y be the number of $5 coins

x + y = 40 - eq(1)

2x + 5y = 140 - eq(2)

Solving eq(1) and eq(2)

y = 20 and x = 20