On Tuesday, Min, Emma, Shiyun and Natalie spent a total of $194. On Wednesday, Min spent twice of what she spent on Tuesday, Emma spent the same as what she spent on Tuesday, Shiyun spent $8 less than what she spent on Tuesday, and Natalie spent $4 more than what she spent on Tuesday. All of them spent an equal amount on Wednesday. How much did Min and Natalie spend altogether on Tuesday?
|
Min |
Emma |
Shiyun |
Natalie |
Total |
Before |
1 u |
3 u |
3 u + $8 |
3 u - $4 |
$194 |
Change |
x 3 |
|
- $8 |
+ $4 |
|
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 - 4
= 10 u + 8 - 4
= 10 u + 4
10 u + 4 = 194
10 u = 194 - 4
10 u = 190
1 u = 190 ÷ 10 = 19
Total amount that Min and Natalie spent on Tuesday
= 1 u + 3 u - 4
= 4 u - 4
= 4 x 19 - 4
= 76 - 4
= $72
Answer(s): $72