On Saturday, Yoko, Risa, Gabby and Penelope spent a total of $152. On Sunday, Yoko spent twice of what she spent on Saturday, Risa spent the same as what she spent on Saturday, Gabby spent $15 less than what she spent on Saturday, and Penelope spent $3 more than what she spent on Saturday. All of them spent an equal amount on Sunday. How much did Yoko and Penelope spend altogether on Saturday?
| |
Yoko |
Risa |
Gabby |
Penelope |
Total |
| Before |
1 u |
3 u |
3 u + $15 |
3 u - $3 |
$152 |
| Change |
x 3 |
|
- $15 |
+ $3 |
|
| After |
3 u |
3 u |
3 u |
3 u |
|
Total amount that the four girls spent on Saturday
= 1 u + 3 u + 3 u + 15 + 3 u - 3
= 10 u + 15 - 3
= 10 u + 12
10 u + 12 = 152
10 u = 152 - 12
10 u = 140
1 u = 140 ÷ 10 = 14
Total amount that Yoko and Penelope spent on Saturday
= 1 u + 3 u - 3
= 4 u - 3
= 4 x 14 - 3
= 56 - 3
= $53
Answer(s): $53
