Buns are sold in Victoria Confectionery at the prices as shown:
1 blueberry bun $2.90
1 cheese bun $2.20
MrsLeow bought 3 more cheese buns than blueberry buns from this confectionery. She paid $27 in total. How many buns did Mrs Leow buy altogether?
|
Blueberry buns |
Cheese buns |
Total buns |
Number |
1 u |
1 u + 3 |
|
Value |
2.90 |
2.20 |
|
Total value |
2.9 u |
2.2 u + 6.6 |
5.1 u + 6.6 |
Amount that Mrs Leow paid for blueberry buns
= 1 u x 2.90
= 2.9 u
Amount that Mrs Leow paid for cheese buns
= 2.20 x (1 u + 3)
= 2.2 u + 6.6
Total amount that Mrs Leow paid
= 2.9 u + 2.2 u + 6.6
= 5.1 u + 6.6
5.1 u + 6.6= 27
5.1 u = 27 - 6.6
5.1 u = 20.4
1 u = 20.4 ÷ 5.1 = 4
Number of buns that Mrs Leow bought altogether
= 2 u + 3
= 2 x 4 + 3
= 8 + 3
= 11
Answer(s): 11