On Saturday, Joelle, Jean, Hilda and Gwen spent a total of $140. On Sunday, Joelle spent twice of what she spent on Saturday, Jean spent the same as what she spent on Saturday, Hilda spent $11 less than what she spent on Saturday, and Gwen spent $4 more than what she spent on Saturday. All of them spent an equal amount on Sunday. How much did Joelle and Gwen spend altogether on Saturday?
|
Joelle |
Jean |
Hilda |
Gwen |
Total |
Before |
1 u |
2 u |
2 u + $11 |
2 u - $4 |
$140 |
Change |
x 2 |
|
- $11 |
+ $4 |
|
After |
2 u |
2 u |
2 u |
2 u |
|
Total amount that the four girls spent on Saturday
= 1 u + 2 u + 2 u + 11 + 2 u - 4
= 7 u + 11 - 4
= 7 u + 7
7 u + 7 = 140
7 u = 140 - 7
7 u = 133
1 u = 133 ÷ 7 = 19
Total amount that Joelle and Gwen spent on Saturday
= 1 u + 2 u - 4
= 3 u - 4
= 3 x 19 - 4
= 57 - 4
= $53
Answer(s): $53