Gwen had some money. If she buys 4 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.
4 M + 8 = 7 M + 2
7 M - 4 M = 8 - 2
3 M = 6
1 M = 6 ÷ 3 = 2
Cost of each mochi ball = $2
(b)
Total amount that Gwen had
= 7 x 2 + 2
= 14 + 2
= $16
Answer(s): (a) $2; (b) $16