Cindy had some money. If she buys 7 mochi balls, she will have $10 left. If she buys 10 mochi balls, she will have $4 left.
- How much does each mochi ball cost?
- How much money does she have?
(a)
Let 1 M be the price of 1 mochi ball.
7 M + 10 = 10 M + 4
10 M - 7 M = 10 - 4
3 M = 6
1 M = 6 ÷ 3 = 2
Cost of each mochi ball = $2
(b)
Total amount that Cindy had
= 10 x 2 + 4
= 20 + 4
= $24
Answer(s): (a) $2; (b) $24