Dana had some money. If she buys 11 mini cupcakes, she will have $7 left. If she buys 13 mini cupcakes, she will have $3 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.
11 M + 7 = 13 M + 3
13 M - 11 M = 7 - 3
2 M = 4
1 M = 4 ÷ 2 = 2
Cost of each mini cupcake = $2
(b)
Total amount that Dana had
= 13 x 2 + 3
= 26 + 3
= $29
Answer(s): (a) $2; (b) $29