Muffins are sold in Yoko Bakery at the prices as shown:
1 apricot muffin $2.70
1 strawberry muffin $1.40
MrsKoh bought 4 more strawberry muffins than apricot muffins from this bakery. She paid $22 in total. How many muffins did Mrs Koh buy altogether?
|
Apricot muffins |
Strawberry muffins |
Total muffins |
Number |
1 u |
1 u + 4 |
|
Value |
2.70 |
1.40 |
|
Total value |
2.7 u |
1.4 u + 5.6 |
4.1 u + 5.6 |
Amount that Mrs Koh paid for apricot muffins
= 1 u x 2.70
= 2.7 u
Amount that Mrs Koh paid for strawberry muffins
= 1.40 x (1 u + 4)
= 1.4 u + 5.6
Total amount that Mrs Koh paid
= 2.7 u + 1.4 u + 5.6
= 4.1 u + 5.6
4.1 u + 5.6= 22
4.1 u = 22 - 5.6
4.1 u = 16.4
1 u = 16.4 ÷ 4.1 = 4
Number of muffins that Mrs Koh bought altogether
= 2 u + 4
= 2 x 4 + 4
= 8 + 4
= 12
Answer(s): 12