Cupcakes are sold in Jean Pastry Shop at the prices as shown:
1 cheese cupcake $2.40
1 apple cupcake $1.50
MrsLeng bought 3 more apple cupcakes than cheese cupcakes from this pastry shop. She paid $24 in total. How many cupcakes did Mrs Leng buy altogether?
|
Cheese cupcakes |
Apple cupcakes |
Total cupcakes |
Number |
1 u |
1 u + 3 |
|
Value |
2.40 |
1.50 |
|
Total value |
2.4 u |
1.5 u + 4.5 |
3.9 u + 4.5 |
Amount that Mrs Leng paid for cheese cupcakes
= 1 u x 2.40
= 2.4 u
Amount that Mrs Leng paid for apple cupcakes
= 1.50 x (1 u + 3)
= 1.5 u + 4.5
Total amount that Mrs Leng paid
= 2.4 u + 1.5 u + 4.5
= 3.9 u + 4.5
3.9 u + 4.5= 24
3.9 u = 24 - 4.5
3.9 u = 19.5
1 u = 19.5 ÷ 3.9 = 5
Number of cupcakes that Mrs Leng bought altogether
= 2 u + 3
= 2 x 5 + 3
= 10 + 3
= 13
Answer(s): 13