Lynn wanted to buy some shortbreads and muffins. The cost of a shortbread was
15 the cost of a muffin. A set of 4 shortbreads and 3 muffins cost $13.30. What was the total amount Lynn had to pay for 3 shortbreads and 3 muffins?
| |
Shortbreads |
Muffins |
Total |
| Number |
4 |
3 |
|
| Value |
1 u |
5 u |
|
| Total value |
4 u |
15 u |
19 u |
Total cost of shortbreads and muffins
= 4 u + 15 u
= 19 u
19 u = 13.3
1 u = 13.30 ÷ 19 = 0.7
Cost of 3 shortbreads and 3 muffins
= 3 x 1 u + 3 x 5 u
= 3 u + 15 u
= 18 u
= 18 x 0.7
= $12.60
Answer(s): $12.60
