On Tuesday, Kylie, Min, Elyse and Jen spent a total of $143. On Wednesday, Kylie spent twice of what she spent on Tuesday, Min spent the same as what she spent on Tuesday, Elyse spent $20 less than what she spent on Tuesday, and Jen spent $10 more than what she spent on Tuesday. All of them spent an equal amount on Wednesday. How much did Kylie and Jen spend altogether on Tuesday?
| |
Kylie |
Min |
Elyse |
Jen |
Total |
| Before |
1 u |
2 u |
2 u + $20 |
2 u - $10 |
$143 |
| Change |
x 2 |
|
- $20 |
+ $10 |
|
| After |
2 u |
2 u |
2 u |
2 u |
|
Total amount that the four girls spent on Tuesday
= 1 u + 2 u + 2 u + 20 + 2 u - 10
= 7 u + 20 - 10
= 7 u + 10
7 u + 10 = 143
7 u = 143 - 10
7 u = 133
1 u = 133 ÷ 7 = 19
Total amount that Kylie and Jen spent on Tuesday
= 1 u + 2 u - 10
= 3 u - 10
= 3 x 19 - 10
= 57 - 10
= $47
Answer(s): $47
