On Saturday, Gwen, Fanny, Betty and Emma spent a total of $146. On Sunday, Gwen spent twice of what she spent on Saturday, Fanny spent the same as what she spent on Saturday, Betty spent $7 less than what she spent on Saturday, and Emma spent $1 more than what she spent on Saturday. All of them spent an equal amount on Sunday. How much did Gwen and Emma spend altogether on Saturday?
| |
Gwen |
Fanny |
Betty |
Emma |
Total |
| Before |
1 u |
3 u |
3 u + $7 |
3 u - $1 |
$146 |
| Change |
x 3 |
|
- $7 |
+ $1 |
|
| After |
3 u |
3 u |
3 u |
3 u |
|
Total amount that the four girls spent on Saturday
= 1 u + 3 u + 3 u + 7 + 3 u - 1
= 10 u + 7 - 1
= 10 u + 6
10 u + 6 = 146
10 u = 146 - 6
10 u = 140
1 u = 140 ÷ 10 = 14
Total amount that Gwen and Emma spent on Saturday
= 1 u + 3 u - 1
= 4 u - 1
= 4 x 14 - 1
= 56 - 1
= $55
Answer(s): $55
