Question

Shipra has 36 coins in her piggy bank. It contains some 1 rupee coins, 2 rupees coins and 5 rupees coins. The total amount is Rs.88. Find the number of coins in each

Answer 1

let the coins of
1 rupee be x
2 rupees y
and 5 rupees z
so
$x + y + z = 36$
$x + 2y + 5z = 88$
$x = 88 - 2y - 5z$
[tex]88 - 2y - 5z + y + z = 36 = 88 - y - 4z
=y+4z=88-36=52