Buns are sold in Nicole Bread Shop at the prices as shown:
1 strawberry bun $2.20
1 cranberry bun $1.20
MrsOng bought 7 more cranberry buns than strawberry buns from this bread shop. She paid $22 in total. How many buns did Mrs Ong buy altogether?
|
Strawberry buns |
Cranberry buns |
Total buns |
Number |
1 u |
1 u + 7 |
|
Value |
2.20 |
1.20 |
|
Total value |
2.2 u |
1.2 u + 8.4 |
3.4 u + 8.4 |
Amount that Mrs Ong paid for strawberry buns
= 1 u x 2.20
= 2.2 u
Amount that Mrs Ong paid for cranberry buns
= 1.20 x (1 u + 7)
= 1.2 u + 8.4
Total amount that Mrs Ong paid
= 2.2 u + 1.2 u + 8.4
= 3.4 u + 8.4
3.4 u + 8.4= 22
3.4 u = 22 - 8.4
3.4 u = 13.6
1 u = 13.6 ÷ 3.4 = 4
Number of buns that Mrs Ong bought altogether
= 2 u + 7
= 2 x 4 + 7
= 8 + 7
= 15
Answer(s): 15