On Friday, Kathy, Jade, Lynn and Gwen spent a total of $146. On Saturday, Kathy spent twice of what she spent on Friday, Jade spent the same as what she spent on Friday, Lynn spent $10 less than what she spent on Friday, and Gwen spent $4 more than what she spent on Friday. All of them spent an equal amount on Saturday. How much did Kathy and Gwen spend altogether on Friday?
| |
Kathy |
Jade |
Lynn |
Gwen |
Total |
| Before |
1 u |
3 u |
3 u + $10 |
3 u - $4 |
$146 |
| Change |
x 3 |
|
- $10 |
+ $4 |
|
| After |
3 u |
3 u |
3 u |
3 u |
|
Total amount that the four girls spent on Friday
= 1 u + 3 u + 3 u + 10 + 3 u - 4
= 10 u + 10 - 4
= 10 u + 6
10 u + 6 = 146
10 u = 146 - 6
10 u = 140
1 u = 140 ÷ 10 = 14
Total amount that Kathy and Gwen spent on Friday
= 1 u + 3 u - 4
= 4 u - 4
= 4 x 14 - 4
= 56 - 4
= $52
Answer(s): $52
