Cupcakes are sold in Victoria Bread Shop at the prices as shown:
1 strawberry cupcake $1.90
1 cheese cupcake $1.30
MrsKok bought 8 more cheese cupcakes than strawberry cupcakes from this bread shop. She paid $20 in total. How many cupcakes did Mrs Kok buy altogether?
|
Strawberry cupcakes |
Cheese cupcakes |
Total cupcakes |
Number |
1 u |
1 u + 8 |
|
Value |
1.90 |
1.30 |
|
Total value |
1.9 u |
1.3 u + 10.4 |
3.2 u + 10.4 |
Amount that Mrs Kok paid for strawberry cupcakes
= 1 u x 1.90
= 1.9 u
Amount that Mrs Kok paid for cheese cupcakes
= 1.30 x (1 u + 8)
= 1.3 u + 10.4
Total amount that Mrs Kok paid
= 1.9 u + 1.3 u + 10.4
= 3.2 u + 10.4
3.2 u + 10.4= 20
3.2 u = 20 - 10.4
3.2 u = 9.6
1 u = 9.6 ÷ 3.2 = 3
Number of cupcakes that Mrs Kok bought altogether
= 2 u + 8
= 2 x 3 + 8
= 6 + 8
= 14
Answer(s): 14