Muffins are sold in Julie Bread Shop at the prices as shown:
1 cheese muffin $2.80
1 cherry muffin $2.40
MrsKong bought 4 more cherry muffins than cheese muffins from this bread shop. She paid $20 in total. How many muffins did Mrs Kong buy altogether?
|
Cheese muffins |
Cherry muffins |
Total muffins |
Number |
1 u |
1 u + 4 |
|
Value |
2.80 |
2.40 |
|
Total value |
2.8 u |
2.4 u + 9.6 |
5.2 u + 9.6 |
Amount that Mrs Kong paid for cheese muffins
= 1 u x 2.80
= 2.8 u
Amount that Mrs Kong paid for cherry muffins
= 2.40 x (1 u + 4)
= 2.4 u + 9.6
Total amount that Mrs Kong paid
= 2.8 u + 2.4 u + 9.6
= 5.2 u + 9.6
5.2 u + 9.6= 20
5.2 u = 20 - 9.6
5.2 u = 10.4
1 u = 10.4 ÷ 5.2 = 2
Number of muffins that Mrs Kong bought altogether
= 2 u + 4
= 2 x 2 + 4
= 4 + 4
= 8
Answer(s): 8