Buns are sold in Fiona Bakery at the prices as shown:
1 cherry bun $1.60
1 strawberry bun $1.20
MrsChoy bought 7 more strawberry buns than cherry buns from this bakery. She paid $14 in total. How many buns did Mrs Choy buy altogether?
|
Cherry buns |
Strawberry buns |
Total buns |
Number |
1 u |
1 u + 7 |
|
Value |
1.60 |
1.20 |
|
Total value |
1.6 u |
1.2 u + 8.4 |
2.8 u + 8.4 |
Amount that Mrs Choy paid for cherry buns
= 1 u x 1.60
= 1.6 u
Amount that Mrs Choy paid for strawberry buns
= 1.20 x (1 u + 7)
= 1.2 u + 8.4
Total amount that Mrs Choy paid
= 1.6 u + 1.2 u + 8.4
= 2.8 u + 8.4
2.8 u + 8.4= 14
2.8 u = 14 - 8.4
2.8 u = 5.6
1 u = 5.6 ÷ 2.8 = 2
Number of buns that Mrs Choy bought altogether
= 2 u + 7
= 2 x 2 + 7
= 4 + 7
= 11
Answer(s): 11