santasad13
Junior Member
- Joined
- Jan 26, 2006
- Messages
- 50
Warren has 40 coins (all nickels, dimes and quarters) worth $4.05. He has 7 more nickles than dimes. How many quarters does he have?
dimes: 10n + 7
nickles: 5n
quarters: 40 - (2n + 7)25
10n + 7 + 5n + 40 - (2n + 7)25 = 405
15n + 47 - 50n + 175 = 405
-35n + 222 = 405
-35n = 608
I can't divide that out because I would get a fraction.
dimes: 10n + 7
nickles: 5n
quarters: 40 - (2n + 7)25
10n + 7 + 5n + 40 - (2n + 7)25 = 405
15n + 47 - 50n + 175 = 405
-35n + 222 = 405
-35n = 608
I can't divide that out because I would get a fraction.