On Friday, Irene, Gillian, Yen and Wendy spent a total of $154. On Saturday, Irene spent twice of what she spent on Friday, Gillian spent the same as what she spent on Friday, Yen spent $16 less than what she spent on Friday, and Wendy spent $2 more than what she spent on Friday. All of them spent an equal amount on Saturday. How much did Irene and Wendy spend altogether on Friday?
| |
Irene |
Gillian |
Yen |
Wendy |
Total |
| Before |
1 u |
2 u |
2 u + $16 |
2 u - $2 |
$154 |
| Change |
x 2 |
|
- $16 |
+ $2 |
|
| After |
2 u |
2 u |
2 u |
2 u |
|
Total amount that the four girls spent on Friday
= 1 u + 2 u + 2 u + 16 + 2 u - 2
= 7 u + 16 - 2
= 7 u + 14
7 u + 14 = 154
7 u = 154 - 14
7 u = 140
1 u = 140 ÷ 7 = 20
Total amount that Irene and Wendy spent on Friday
= 1 u + 2 u - 2
= 3 u - 2
= 3 x 20 - 2
= 60 - 2
= $58
Answer(s): $58
