On Monday, Raeann, Risa, Erika and Shannon spent a total of $119. On Tuesday, Raeann spent twice of what she spent on Monday, Risa spent the same as what she spent on Monday, Erika spent $15 less than what she spent on Monday, and Shannon spent $6 more than what she spent on Monday. All of them spent an equal amount on Tuesday. How much did Raeann and Shannon spend altogether on Monday?
| |
Raeann |
Risa |
Erika |
Shannon |
Total |
| Before |
1 u |
3 u |
3 u + $15 |
3 u - $6 |
$119 |
| Change |
x 3 |
|
- $15 |
+ $6 |
|
| After |
3 u |
3 u |
3 u |
3 u |
|
Total amount that the four girls spent on Monday
= 1 u + 3 u + 3 u + 15 + 3 u - 6
= 10 u + 15 - 6
= 10 u + 9
10 u + 9 = 119
10 u = 119 - 9
10 u = 110
1 u = 110 ÷ 10 = 11
Total amount that Raeann and Shannon spent on Monday
= 1 u + 3 u - 6
= 4 u - 6
= 4 x 11 - 6
= 44 - 6
= $38
Answer(s): $38
