On Friday, Lynn, Tiffany, Barbara and Xuan spent a total of $114. On Saturday, Lynn spent twice of what she spent on Friday, Tiffany spent the same as what she spent on Friday, Barbara spent $7 less than what she spent on Friday, and Xuan spent $3 more than what she spent on Friday. All of them spent an equal amount on Saturday. How much did Lynn and Xuan spend altogether on Friday?
| |
Lynn |
Tiffany |
Barbara |
Xuan |
Total |
| Before |
1 u |
3 u |
3 u + $7 |
3 u - $3 |
$114 |
| Change |
x 3 |
|
- $7 |
+ $3 |
|
| After |
3 u |
3 u |
3 u |
3 u |
|
Total amount that the four girls spent on Friday
= 1 u + 3 u + 3 u + 7 + 3 u - 3
= 10 u + 7 - 3
= 10 u + 4
10 u + 4 = 114
10 u = 114 - 4
10 u = 110
1 u = 110 ÷ 10 = 11
Total amount that Lynn and Xuan spent on Friday
= 1 u + 3 u - 3
= 4 u - 3
= 4 x 11 - 3
= 44 - 3
= $41
Answer(s): $41
