Cupcakes are sold in Victoria Bread Shop at the prices as shown:
1 blueberry cupcake $2.80
1 vanilla cupcake $2.60
MrsToh bought 6 more vanilla cupcakes than blueberry cupcakes from this bread shop. She paid $21 in total. How many cupcakes did Mrs Toh buy altogether?
|
Blueberry cupcakes |
Vanilla cupcakes |
Total cupcakes |
Number |
1 u |
1 u + 6 |
|
Value |
2.80 |
2.60 |
|
Total value |
2.8 u |
2.6 u + 15.6 |
5.4 u + 15.6 |
Amount that Mrs Toh paid for blueberry cupcakes
= 1 u x 2.80
= 2.8 u
Amount that Mrs Toh paid for vanilla cupcakes
= 2.60 x (1 u + 6)
= 2.6 u + 15.6
Total amount that Mrs Toh paid
= 2.8 u + 2.6 u + 15.6
= 5.4 u + 15.6
5.4 u + 15.6= 21
5.4 u = 21 - 15.6
5.4 u = 5.4
1 u = 5.4 ÷ 5.4 = 1
Number of cupcakes that Mrs Toh bought altogether
= 2 u + 6
= 2 x 1 + 6
= 2 + 6
= 8
Answer(s): 8