Nora had
37 as much money as Opal. Nora received another $31 from her aunt and Opal received $6 from her father. In the end, Nora had $9 more than Opal. How much did the girls have altogether in the end?
| |
Nora |
Opal |
| Before |
3 u |
7 u |
| Change |
+ 31 |
+ 6 |
| After |
3 u + 31 |
7 u + 6 |
If Opal received another $9 in the end, she would have the same amount of money as Nora.
7 u + 6 + 9 = 3 u + 31
7 u + 15 = 3 u + 31
7 u - 3 u = 31 - 15
4 u = 16
1 u = 16 ÷ 4 = 4
Amount that the girls had in the end
= 3 u + 31 + 7 u + 6
= 3 u + 7 u + 31 + 6
= 10 u + 37
= 10 x 4 + 37
= $77
Answer(s): $77
