On Thursday, Wendy, Marion, Esther and Xandra spent a total of $83. On Friday, Wendy spent twice of what she spent on Thursday, Marion spent the same as what she spent on Thursday, Esther spent $12 less than what she spent on Thursday, and Xandra spent $6 more than what she spent on Thursday. All of them spent an equal amount on Friday. How much did Wendy and Xandra spend altogether on Thursday?
|
Wendy |
Marion |
Esther |
Xandra |
Total |
Before |
1 u |
2 u |
2 u + $12 |
2 u - $6 |
$83 |
Change |
x 2 |
|
- $12 |
+ $6 |
|
After |
2 u |
2 u |
2 u |
2 u |
|
Total amount that the four girls spent on Thursday
= 1 u + 2 u + 2 u + 12 + 2 u - 6
= 7 u + 12 - 6
= 7 u + 6
7 u + 6 = 83
7 u = 83 - 6
7 u = 77
1 u = 77 ÷ 7 = 11
Total amount that Wendy and Xandra spent on Thursday
= 1 u + 2 u - 6
= 3 u - 6
= 3 x 11 - 6
= 33 - 6
= $27
Answer(s): $27