On Tuesday, Winnie, Shiyun, Olivia and Rachel spent a total of $155. On Wednesday, Winnie spent twice of what she spent on Tuesday, Shiyun spent the same as what she spent on Tuesday, Olivia spent $8 less than what she spent on Tuesday, and Rachel spent $3 more than what she spent on Tuesday. All of them spent an equal amount on Wednesday. How much did Winnie and Rachel spend altogether on Tuesday?
|
Winnie |
Shiyun |
Olivia |
Rachel |
Total |
Before |
1 u |
3 u |
3 u + $8 |
3 u - $3 |
$155 |
Change |
x 3 |
|
- $8 |
+ $3 |
|
After |
3 u |
3 u |
3 u |
3 u |
|
Total amount that the four girls spent on Tuesday
= 1 u + 3 u + 3 u + 8 + 3 u - 3
= 10 u + 8 - 3
= 10 u + 5
10 u + 5 = 155
10 u = 155 - 5
10 u = 150
1 u = 150 ÷ 10 = 15
Total amount that Winnie and Rachel spent on Tuesday
= 1 u + 3 u - 3
= 4 u - 3
= 4 x 15 - 3
= 60 - 3
= $57
Answer(s): $57