Emma had some money. If she buys 12 mochi balls, she will have $10 left. If she buys 15 mochi balls, she will have $1 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.
12 M + 10 = 15 M + 1
15 M - 12 M = 10 - 1
3 M = 9
1 M = 9 ÷ 3 = 3
Cost of each mochi ball = $3
(b)
Total amount that Emma had
= 15 x 3 + 1
= 45 + 1
= $46
Answer(s): (a) $3; (b) $46