Question

Marty has a piggy bank that contains $2.25. The piggy bank contains only quarters and dimes. There are twice as many dimes as quarters in the bank. How many dimes are in the piggy bank?

Answer 1

10d + 25q = 225
d = 2q

10(2q) +25q = 225
20q + 25q = 225
45q = 225
q = 5
d = 10
Answer: 5 quartters ($1.25) + 10 dimes($1.00) are in the piggy bank.

Answer 2

Thanks:)