Sabrina had
310 as much money as Diana. Sabrina received another $42 from her aunt and Diana spent $7 on some notebooks. In the end, Sabrina and Diana had an equal amount of money. How much money did the girls have altogether in the end?
| |
Sabrina |
Diana |
Total |
| Before |
3 u |
10 u |
|
| Change |
+ $42 |
- $7 |
|
| After |
3 u + $42 |
10 u - $7 |
13 u + $35 |
Amount of money Sabrina and Diana has is the same in the end.
10 u - 7 = 3 u + 42
10 u - 3 u = 42 + 7
7 u = 49
1 u = 49 ÷ 7 = 7
Amount the girls have in the end
= 3 u + 42 + 10 u - 7
= 13 u + 35
= 13 x 7 + 35
= 91 + 35
= $126
Answer(s): $126
