Cupcakes are sold in Marion Bread Shop at the prices as shown:
1 strawberry cupcake $2.50
1 vanilla cupcake $1.70
MrsChan bought 2 more vanilla cupcakes than strawberry cupcakes from this bread shop. She paid $16 in total. How many cupcakes did Mrs Chan buy altogether?
|
Strawberry cupcakes |
Vanilla cupcakes |
Total cupcakes |
Number |
1 u |
1 u + 2 |
|
Value |
2.50 |
1.70 |
|
Total value |
2.5 u |
1.7 u + 3.4 |
4.2 u + 3.4 |
Amount that Mrs Chan paid for strawberry cupcakes
= 1 u x 2.50
= 2.5 u
Amount that Mrs Chan paid for vanilla cupcakes
= 1.70 x (1 u + 2)
= 1.7 u + 3.4
Total amount that Mrs Chan paid
= 2.5 u + 1.7 u + 3.4
= 4.2 u + 3.4
4.2 u + 3.4= 16
4.2 u = 16 - 3.4
4.2 u = 12.6
1 u = 12.6 ÷ 4.2 = 3
Number of cupcakes that Mrs Chan bought altogether
= 2 u + 2
= 2 x 3 + 2
= 6 + 2
= 8
Answer(s): 8