There are some $2 and 50￠coins in a purse. If the total number of coins is 17 and their total value is $22, find the total value of $2 coins

Question

It's about equations. And have to find the total value of the $2 coins. By the format of equations and terms.

Answer 1

X = # of $2 coins

Y = # of $0.50 coins

 

Coin Count equation

X+Y = 17

X*2 + Y*0.50 = 22

Y = 17-X

X*2+(17-X)*0.50 = 22

X*2 + 8.5 - 0.50X = 22

1.5* X = 22 - 8.5

X = (13.5/1.5) = 9

 

nine $2.00 coins