On Saturday, Julie, Gillian, Winnie and Xandra spent a total of $171. On Sunday, Julie spent twice of what she spent on Saturday, Gillian spent the same as what she spent on Saturday, Winnie spent $14 less than what she spent on Saturday, and Xandra spent $3 more than what she spent on Saturday. All of them spent an equal amount on Sunday. How much did Julie and Xandra spend altogether on Saturday?
| |
Julie |
Gillian |
Winnie |
Xandra |
Total |
| Before |
1 u |
3 u |
3 u + $14 |
3 u - $3 |
$171 |
| Change |
x 3 |
|
- $14 |
+ $3 |
|
| After |
3 u |
3 u |
3 u |
3 u |
|
Total amount that the four girls spent on Saturday
= 1 u + 3 u + 3 u + 14 + 3 u - 3
= 10 u + 14 - 3
= 10 u + 11
10 u + 11 = 171
10 u = 171 - 11
10 u = 160
1 u = 160 ÷ 10 = 16
Total amount that Julie and Xandra spent on Saturday
= 1 u + 3 u - 3
= 4 u - 3
= 4 x 16 - 3
= 64 - 3
= $61
Answer(s): $61
