how many quarters does she have?

Question

Amber wants to play skee ball, which requires one quarter per play. She has a total of $2.05 and that includes a mix of quarters and dimes. If she has four more quarters than dimes, how many quarters does she have?

Answer 1

25Q + 10D = 205

Q - D = 4

10Q -10D = 40 add 1st equation to get

35Q = 245

Q = 245/35 = 7 quarters

D = 7-4 = 3 dimes

25(7) + 10(3) = 175 + 30 = 205

she can afford 8 skee ball games, with 5 cents left over 205/25 = 8.2 = enough money for 8 games and 1/5 of a game