Penelope had some money. If she buys 5 mini cupcakes, she will have $10 left. If she buys 7 mini cupcakes, she will have $2 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.
5 M + 10 = 7 M + 2
7 M - 5 M = 10 - 2
2 M = 8
1 M = 8 ÷ 2 = 4
Cost of each mini cupcake = $4
(b)
Total amount that Penelope had
= 7 x 4 + 2
= 28 + 2
= $30
Answer(s): (a) $4; (b) $30