On Friday, Cathy, Sabrina, Kimberly and Raeann spent a total of $143. On Saturday, Cathy spent twice of what she spent on Friday, Sabrina spent the same as what she spent on Friday, Kimberly spent $8 less than what she spent on Friday, and Raeann spent $5 more than what she spent on Friday. All of them spent an equal amount on Saturday. How much did Cathy and Raeann spend altogether on Friday?
|
Cathy |
Sabrina |
Kimberly |
Raeann |
Total |
Before |
1 u |
3 u |
3 u + $8 |
3 u - $5 |
$143 |
Change |
x 3 |
|
- $8 |
+ $5 |
|
After |
3 u |
3 u |
3 u |
3 u |
|
Total amount that the four girls spent on Friday
= 1 u + 3 u + 3 u + 8 + 3 u - 5
= 10 u + 8 - 5
= 10 u + 3
10 u + 3 = 143
10 u = 143 - 3
10 u = 140
1 u = 140 ÷ 10 = 14
Total amount that Cathy and Raeann spent on Friday
= 1 u + 3 u - 5
= 4 u - 5
= 4 x 14 - 5
= 56 - 5
= $51
Answer(s): $51