Irene had
37 as much money as Dana. Irene received another $28 from her mother and Dana spent $8 on some pencils. In the end, Irene and Dana had an equal amount of money. How much money did the girls have altogether in the end?
|
Irene |
Dana |
Total |
Before |
3 u |
7 u |
|
Change |
+ $28 |
- $8 |
|
After |
3 u + $28 |
7 u - $8 |
10 u + $20 |
Amount of money Irene and Dana has is the same in the end.
7 u - 8 = 3 u + 28
7 u - 3 u = 28 + 8
4 u = 36
1 u = 36 ÷ 4 = 9
Amount the girls have in the end
= 3 u + 28 + 7 u - 8
= 10 u + 20
= 10 x 9 + 20
= 90 + 20
= $110
Answer(s): $110