Sarah had some money. If she buys 9 mini cupcakes, she will have $9 left. If she buys 11 mini cupcakes, she will have $1 left.
- How much does each mini cupcake cost?
- How much money does she have?
(a)
Let 1 M be the price of 1 mini cupcake.
9 M + 9 = 11 M + 1
11 M - 9 M = 9 - 1
2 M = 8
1 M = 8 ÷ 2 = 4
Cost of each mini cupcake = $4
(b)
Total amount that Sarah had
= 11 x 4 + 1
= 44 + 1
= $45
Answer(s): (a) $4; (b) $45