Buns are sold in Gabby Bakery at the prices as shown:
1 banana bun $1.90
1 cranberry bun $1.70
MrsKoh bought 12 more cranberry buns than banana buns from this bakery. She paid $24 in total. How many buns did Mrs Koh buy altogether?
|
Banana buns |
Cranberry buns |
Total buns |
Number |
1 u |
1 u + 12 |
|
Value |
1.90 |
1.70 |
|
Total value |
1.9 u |
1.7 u + 20.4 |
3.6 u + 20.4 |
Amount that Mrs Koh paid for banana buns
= 1 u x 1.90
= 1.9 u
Amount that Mrs Koh paid for cranberry buns
= 1.70 x (1 u + 12)
= 1.7 u + 20.4
Total amount that Mrs Koh paid
= 1.9 u + 1.7 u + 20.4
= 3.6 u + 20.4
3.6 u + 20.4= 24
3.6 u = 24 - 20.4
3.6 u = 3.6
1 u = 3.6 ÷ 3.6 = 1
Number of buns that Mrs Koh bought altogether
= 2 u + 12
= 2 x 1 + 12
= 2 + 12
= 14
Answer(s): 14