Cindy bought 5 biscuits more than wafers. Each biscuit cost $1.90 while each wafer cost $1.50. Given that she spent $29.90 in total, how many wafers did Cindy buy?
| |
Wafers |
Biscuits |
Total |
| Number |
1 u |
1 u + 5 |
|
| Value |
$1.50 |
$1.90 |
|
| Total value |
1.5 u |
1.9 u + 9.5 |
1.9 u + 9.5 |
Amount that Cindy paid for the wafers
= 1 u x 1.50
= 1.5 u
Amount that Cindy paid for biscuits
= 1.9 x (1 u + 5)
= 1.9 u + 9.5
Total amount that Cindy paid
= 1.5 u + 1.9 u + 9.5
= 3.4 u + 9.5
3.4 u + 9.5 = 29.9
3.4 u = 29.9 - 9.5
3.4 u = 20.4
1 u = 20.4 ÷ 3.4 = 6
Number of wafers that Cindy bought
= 1 u
= 6
Answer(s): 6
