Hilda had some money. If she buys 10 mochi balls, she will have $10 left. If she buys 12 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.
10 M + 10 = 12 M + 4
12 M - 10 M = 10 - 4
2 M = 6
1 M = 6 ÷ 2 = 3
Cost of each mochi ball = $3
(b)
Total amount that Hilda had
= 12 x 3 + 4
= 36 + 4
= $40
Answer(s): (a) $3; (b) $40