Joelle bought 8 wafers more than biscuits. Each wafer cost $1.60 while each biscuit cost $1.20. Given that she spent $26.80 in total, how many biscuits did Joelle buy?
| |
Biscuits |
Wafers |
Total |
| Number |
1 u |
1 u + 8 |
|
| Value |
$1.20 |
$1.60 |
|
| Total value |
1.2 u |
1.6 u + 12.8 |
1.6 u + 12.8 |
Amount that Joelle paid for the biscuits
= 1 u x 1.20
= 1.2 u
Amount that Joelle paid for wafers
= 1.6 x (1 u + 8)
= 1.6 u + 12.8
Total amount that Joelle paid
= 1.2 u + 1.6 u + 12.8
= 2.8 u + 12.8
2.8 u + 12.8 = 26.8
2.8 u = 26.8 - 12.8
2.8 u = 14
1 u = 14 ÷ 2.8 = 5
Number of biscuits that Joelle bought
= 1 u
= 5
Answer(s): 5
