Buns are sold in Jen Pastry Shop at the prices as shown:
1 cheese bun $2.50
1 cranberry bun $1.80
MrsCheong bought 8 more cranberry buns than cheese buns from this pastry shop. She paid $23 in total. How many buns did Mrs Cheong buy altogether?
|
Cheese buns |
Cranberry buns |
Total buns |
Number |
1 u |
1 u + 8 |
|
Value |
2.50 |
1.80 |
|
Total value |
2.5 u |
1.8 u + 14.4 |
4.3 u + 14.4 |
Amount that Mrs Cheong paid for cheese buns
= 1 u x 2.50
= 2.5 u
Amount that Mrs Cheong paid for cranberry buns
= 1.80 x (1 u + 8)
= 1.8 u + 14.4
Total amount that Mrs Cheong paid
= 2.5 u + 1.8 u + 14.4
= 4.3 u + 14.4
4.3 u + 14.4= 23
4.3 u = 23 - 14.4
4.3 u = 8.6
1 u = 8.6 ÷ 4.3 = 2
Number of buns that Mrs Cheong bought altogether
= 2 u + 8
= 2 x 2 + 8
= 4 + 8
= 12
Answer(s): 12