On Thursday, Jean, Kathy, Fanny and Dana spent a total of $97. On Friday, Jean spent twice of what she spent on Thursday, Kathy spent the same as what she spent on Thursday, Fanny spent $17 less than what she spent on Thursday, and Dana spent $11 more than what she spent on Thursday. All of them spent an equal amount on Friday. How much did Jean and Dana spend altogether on Thursday?
| |
Jean |
Kathy |
Fanny |
Dana |
Total |
| Before |
1 u |
2 u |
2 u + $17 |
2 u - $11 |
$97 |
| Change |
x 2 |
|
- $17 |
+ $11 |
|
| After |
2 u |
2 u |
2 u |
2 u |
|
Total amount that the four girls spent on Thursday
= 1 u + 2 u + 2 u + 17 + 2 u - 11
= 7 u + 17 - 11
= 7 u + 6
7 u + 6 = 97
7 u = 97 - 6
7 u = 91
1 u = 91 ÷ 7 = 13
Total amount that Jean and Dana spent on Thursday
= 1 u + 2 u - 11
= 3 u - 11
= 3 x 13 - 11
= 39 - 11
= $28
Answer(s): $28
