Cindy bought 3 croissants more than biscuits. Each croissant cost $0.60 while each biscuit cost $1.70. Given that she spent $27.10 in total, how many biscuits did Cindy buy?
| |
Biscuits |
Croissants |
Total |
| Number |
1 u |
1 u + 3 |
|
| Value |
$1.70 |
$0.60 |
|
| Total value |
1.7 u |
0.6 u + 1.8 |
0.6 u + 1.8 |
Amount that Cindy paid for the biscuits
= 1 u x 1.70
= 1.7 u
Amount that Cindy paid for croissants
= 0.6 x (1 u + 3)
= 0.6 u + 1.8
Total amount that Cindy paid
= 1.7 u + 0.6 u + 1.8
= 2.3 u + 1.8
2.3 u + 1.8 = 27.1
2.3 u = 27.1 - 1.8
2.3 u = 25.3
1 u = 25.3 ÷ 2.3 = 11
Number of biscuits that Cindy bought
= 1 u
= 11
Answer(s): 11
