Cupcakes are sold in Diana Bread Shop at the prices as shown:
1 strawberry cupcake $2.60
1 banana cupcake $1.60
MrsSeow bought 4 more banana cupcakes than strawberry cupcakes from this bread shop. She paid $19 in total. How many cupcakes did Mrs Seow buy altogether?
|
Strawberry cupcakes |
Banana cupcakes |
Total cupcakes |
Number |
1 u |
1 u + 4 |
|
Value |
2.60 |
1.60 |
|
Total value |
2.6 u |
1.6 u + 6.4 |
4.2 u + 6.4 |
Amount that Mrs Seow paid for strawberry cupcakes
= 1 u x 2.60
= 2.6 u
Amount that Mrs Seow paid for banana cupcakes
= 1.60 x (1 u + 4)
= 1.6 u + 6.4
Total amount that Mrs Seow paid
= 2.6 u + 1.6 u + 6.4
= 4.2 u + 6.4
4.2 u + 6.4= 19
4.2 u = 19 - 6.4
4.2 u = 12.6
1 u = 12.6 ÷ 4.2 = 3
Number of cupcakes that Mrs Seow bought altogether
= 2 u + 4
= 2 x 3 + 4
= 6 + 4
= 10
Answer(s): 10