Esther had some money. If she buys 5 mochi balls, she will have $8 left. If she buys 7 mochi balls, she will have $2 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.
5 M + 8 = 7 M + 2
7 M - 5 M = 8 - 2
2 M = 6
1 M = 6 ÷ 2 = 3
Cost of each mochi ball = $3
(b)
Total amount that Esther had
= 7 x 3 + 2
= 21 + 2
= $23
Answer(s): (a) $3; (b) $23