Muffins are sold in Jade Bread Shop at the prices as shown:
1 apple muffin $2.70
1 cheese muffin $2.10
MrsAng bought 4 more cheese muffins than apple muffins from this bread shop. She paid $18 in total. How many muffins did Mrs Ang buy altogether?
|
Apple muffins |
Cheese muffins |
Total muffins |
Number |
1 u |
1 u + 4 |
|
Value |
2.70 |
2.10 |
|
Total value |
2.7 u |
2.1 u + 8.4 |
4.8 u + 8.4 |
Amount that Mrs Ang paid for apple muffins
= 1 u x 2.70
= 2.7 u
Amount that Mrs Ang paid for cheese muffins
= 2.10 x (1 u + 4)
= 2.1 u + 8.4
Total amount that Mrs Ang paid
= 2.7 u + 2.1 u + 8.4
= 4.8 u + 8.4
4.8 u + 8.4= 18
4.8 u = 18 - 8.4
4.8 u = 9.6
1 u = 9.6 ÷ 4.8 = 2
Number of muffins that Mrs Ang bought altogether
= 2 u + 4
= 2 x 2 + 4
= 4 + 4
= 8
Answer(s): 8