On Friday, Irene, Kathy, Sarah and Jane spent a total of $125. On Saturday, Irene spent twice of what she spent on Friday, Kathy spent the same as what she spent on Friday, Sarah spent $18 less than what she spent on Friday, and Jane spent $5 more than what she spent on Friday. All of them spent an equal amount on Saturday. How much did Irene and Jane spend altogether on Friday?
| |
Irene |
Kathy |
Sarah |
Jane |
Total |
| Before |
1 u |
2 u |
2 u + $18 |
2 u - $5 |
$125 |
| Change |
x 2 |
|
- $18 |
+ $5 |
|
| After |
2 u |
2 u |
2 u |
2 u |
|
Total amount that the four girls spent on Friday
= 1 u + 2 u + 2 u + 18 + 2 u - 5
= 7 u + 18 - 5
= 7 u + 13
7 u + 13 = 125
7 u = 125 - 13
7 u = 112
1 u = 112 ÷ 7 = 16
Total amount that Irene and Jane spent on Friday
= 1 u + 2 u - 5
= 3 u - 5
= 3 x 16 - 5
= 48 - 5
= $43
Answer(s): $43
