Zara bought 3 tarts more than puffs. Each tart cost $0.70 while each puff cost $1.60. Given that she spent $25.10 in total, how many puffs did Zara buy?
| |
Puffs |
Tarts |
Total |
| Number |
1 u |
1 u + 3 |
|
| Value |
$1.60 |
$0.70 |
|
| Total value |
1.6 u |
0.7 u + 2.1 |
0.7 u + 2.1 |
Amount that Zara paid for the puffs
= 1 u x 1.60
= 1.6 u
Amount that Zara paid for tarts
= 0.7 x (1 u + 3)
= 0.7 u + 2.1
Total amount that Zara paid
= 1.6 u + 0.7 u + 2.1
= 2.3 u + 2.1
2.3 u + 2.1 = 25.1
2.3 u = 25.1 - 2.1
2.3 u = 23
1 u = 23 ÷ 2.3 = 10
Number of puffs that Zara bought
= 1 u
= 10
Answer(s): 10
