On Friday, Abi, Victoria, Mary and Zoe spent a total of $108. On Saturday, Abi spent twice of what she spent on Friday, Victoria spent the same as what she spent on Friday, Mary spent $14 less than what she spent on Friday, and Zoe spent $4 more than what she spent on Friday. All of them spent an equal amount on Saturday. How much did Abi and Zoe spend altogether on Friday?
| |
Abi |
Victoria |
Mary |
Zoe |
Total |
| Before |
1 u |
2 u |
2 u + $14 |
2 u - $4 |
$108 |
| Change |
x 2 |
|
- $14 |
+ $4 |
|
| After |
2 u |
2 u |
2 u |
2 u |
|
Total amount that the four girls spent on Friday
= 1 u + 2 u + 2 u + 14 + 2 u - 4
= 7 u + 14 - 4
= 7 u + 10
7 u + 10 = 108
7 u = 108 - 10
7 u = 98
1 u = 98 ÷ 7 = 14
Total amount that Abi and Zoe spent on Friday
= 1 u + 2 u - 4
= 3 u - 4
= 3 x 14 - 4
= 42 - 4
= $38
Answer(s): $38
