Muffins are sold in Shiyun Cake Shop at the prices as shown:
1 cranberry muffin $2.40
1 vanilla muffin $1.90
MrsMa bought 3 more vanilla muffins than cranberry muffins from this cake shop. She paid $10 in total. How many muffins did Mrs Ma buy altogether?
|
Cranberry muffins |
Vanilla muffins |
Total muffins |
Number |
1 u |
1 u + 3 |
|
Value |
2.40 |
1.90 |
|
Total value |
2.4 u |
1.9 u + 5.7 |
4.3 u + 5.7 |
Amount that Mrs Ma paid for cranberry muffins
= 1 u x 2.40
= 2.4 u
Amount that Mrs Ma paid for vanilla muffins
= 1.90 x (1 u + 3)
= 1.9 u + 5.7
Total amount that Mrs Ma paid
= 2.4 u + 1.9 u + 5.7
= 4.3 u + 5.7
4.3 u + 5.7= 10
4.3 u = 10 - 5.7
4.3 u = 4.3
1 u = 4.3 ÷ 4.3 = 1
Number of muffins that Mrs Ma bought altogether
= 2 u + 3
= 2 x 1 + 3
= 2 + 3
= 5
Answer(s): 5