Opal had
57 as much money as Xuan. Opal received another $37 from her mother and Xuan received $4 from her aunt. In the end, Opal had $3 more than Xuan. How much did the girls have altogether in the end?
| |
Opal |
Xuan |
| Before |
5 u |
7 u |
| Change |
+ 37 |
+ 4 |
| After |
5 u + 37 |
7 u + 4 |
If Xuan received another $3 in the end, she would have the same amount of money as Opal.
7 u + 4 + 3 = 5 u + 37
7 u + 7 = 5 u + 37
7 u - 5 u = 37 - 7
2 u = 30
1 u = 30 ÷ 2 = 15
Amount that the girls had in the end
= 5 u + 37 + 7 u + 4
= 5 u + 7 u + 37 + 4
= 12 u + 41
= 12 x 15 + 41
= $221
Answer(s): $221
