Shiyun had
17 as much money as Anna. Shiyun received another $33 from her aunt and Anna spent $9 on some pencils. In the end, Shiyun and Anna had an equal amount of money. How much money did the girls have altogether in the end?
|
Shiyun |
Anna |
Total |
Before |
1 u |
7 u |
|
Change |
+ $33 |
- $9 |
|
After |
1 u + $33 |
7 u - $9 |
8 u + $24 |
Amount of money Shiyun and Anna has is the same in the end.
7 u - 9 = 1 u + 33
7 u - 1 u = 33 + 9
6 u = 42
1 u = 42 ÷ 6 = 7
Amount the girls have in the end
= 1 u + 33 + 7 u - 9
= 8 u + 24
= 8 x 7 + 24
= 56 + 24
= $80
Answer(s): $80