Mary had
15 as much money as Barbara. Mary received another $46 from her aunt and Barbara spent $10 on some files. In the end, Mary and Barbara had an equal amount of money. How much money did the girls have altogether in the end?
|
Mary |
Barbara |
Total |
Before |
1 u |
5 u |
|
Change |
+ $46 |
- $10 |
|
After |
1 u + $46 |
5 u - $10 |
6 u + $36 |
Amount of money Mary and Barbara has is the same in the end.
5 u - 10 = 1 u + 46
5 u - 1 u = 46 + 10
4 u = 56
1 u = 56 ÷ 4 = 14
Amount the girls have in the end
= 1 u + 46 + 5 u - 10
= 6 u + 36
= 6 x 14 + 36
= 84 + 36
= $120
Answer(s): $120