Lucy had
57 as much money as Penelope. Lucy received another $39 from her uncle and Penelope received $9 from her aunt. In the end, Lucy had $2 more than Penelope. How much did the girls have altogether in the end?
| |
Lucy |
Penelope |
| Before |
5 u |
7 u |
| Change |
+ 39 |
+ 9 |
| After |
5 u + 39 |
7 u + 9 |
If Penelope received another $2 in the end, she would have the same amount of money as Lucy.
7 u + 9 + 2 = 5 u + 39
7 u + 11 = 5 u + 39
7 u - 5 u = 39 - 11
2 u = 28
1 u = 28 ÷ 2 = 14
Amount that the girls had in the end
= 5 u + 39 + 7 u + 9
= 5 u + 7 u + 39 + 9
= 12 u + 48
= 12 x 14 + 48
= $216
Answer(s): $216
