Joelle had
18 as much money as Irene. Joelle received another $40 from her mother and Irene spent $9 on some files. In the end, Joelle and Irene had an equal amount of money. How much money did the girls have altogether in the end?
|
Joelle |
Irene |
Total |
Before |
1 u |
8 u |
|
Change |
+ $40 |
- $9 |
|
After |
1 u + $40 |
8 u - $9 |
9 u + $31 |
Amount of money Joelle and Irene has is the same in the end.
8 u - 9 = 1 u + 40
8 u - 1 u = 40 + 9
7 u = 49
1 u = 49 ÷ 7 = 7
Amount the girls have in the end
= 1 u + 40 + 8 u - 9
= 9 u + 31
= 9 x 7 + 31
= 63 + 31
= $94
Answer(s): $94