On Wednesday, Joelle, Julie, Vanessa and Usha spent a total of $166. On Thursday, Joelle spent twice of what she spent on Wednesday, Julie spent the same as what she spent on Wednesday, Vanessa spent $13 less than what she spent on Wednesday, and Usha spent $7 more than what she spent on Wednesday. All of them spent an equal amount on Thursday. How much did Joelle and Usha spend altogether on Wednesday?
|
Joelle |
Julie |
Vanessa |
Usha |
Total |
Before |
1 u |
3 u |
3 u + $13 |
3 u - $7 |
$166 |
Change |
x 3 |
|
- $13 |
+ $7 |
|
After |
3 u |
3 u |
3 u |
3 u |
|
Total amount that the four girls spent on Wednesday
= 1 u + 3 u + 3 u + 13 + 3 u - 7
= 10 u + 13 - 7
= 10 u + 6
10 u + 6 = 166
10 u = 166 - 6
10 u = 160
1 u = 160 ÷ 10 = 16
Total amount that Joelle and Usha spent on Wednesday
= 1 u + 3 u - 7
= 4 u - 7
= 4 x 16 - 7
= 64 - 7
= $57
Answer(s): $57