Buns are sold in Pamela Pastry Shop at the prices as shown:
1 blueberry bun $2.70
1 cheese bun $1.60
MrsOh bought 2 more cheese buns than blueberry buns from this pastry shop. She paid $29 in total. How many buns did Mrs Oh buy altogether?
|
Blueberry buns |
Cheese buns |
Total buns |
Number |
1 u |
1 u + 2 |
|
Value |
2.70 |
1.60 |
|
Total value |
2.7 u |
1.6 u + 3.2 |
4.3 u + 3.2 |
Amount that Mrs Oh paid for blueberry buns
= 1 u x 2.70
= 2.7 u
Amount that Mrs Oh paid for cheese buns
= 1.60 x (1 u + 2)
= 1.6 u + 3.2
Total amount that Mrs Oh paid
= 2.7 u + 1.6 u + 3.2
= 4.3 u + 3.2
4.3 u + 3.2= 29
4.3 u = 29 - 3.2
4.3 u = 25.8
1 u = 25.8 ÷ 4.3 = 6
Number of buns that Mrs Oh bought altogether
= 2 u + 2
= 2 x 6 + 2
= 12 + 2
= 14
Answer(s): 14