Mary had some money. If she buys 10 mini cupcakes, she will have $10 left. If she buys 13 mini cupcakes, she will have $4 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.
10 M + 10 = 13 M + 4
13 M - 10 M = 10 - 4
3 M = 6
1 M = 6 ÷ 3 = 2
Cost of each mini cupcake = $2
(b)
Total amount that Mary had
= 13 x 2 + 4
= 26 + 4
= $30
Answer(s): (a) $2; (b) $30