Muffins are sold in Jean Bakery at the prices as shown:
1 strawberry muffin $1.80
1 cranberry muffin $1.70
MrsYong bought 10 more cranberry muffins than strawberry muffins from this bakery. She paid $24 in total. How many muffins did Mrs Yong buy altogether?
|
Strawberry muffins |
Cranberry muffins |
Total muffins |
Number |
1 u |
1 u + 10 |
|
Value |
1.80 |
1.70 |
|
Total value |
1.8 u |
1.7 u + 17 |
3.5 u + 17 |
Amount that Mrs Yong paid for strawberry muffins
= 1 u x 1.80
= 1.8 u
Amount that Mrs Yong paid for cranberry muffins
= 1.70 x (1 u + 10)
= 1.7 u + 17
Total amount that Mrs Yong paid
= 1.8 u + 1.7 u + 17
= 3.5 u + 17
3.5 u + 17= 24
3.5 u = 24 - 17
3.5 u = 7
1 u = 7 ÷ 3.5 = 2
Number of muffins that Mrs Yong bought altogether
= 2 u + 10
= 2 x 2 + 10
= 4 + 10
= 14
Answer(s): 14