Irene had
79 as much money as Jade. Irene received another $40 from her father and Jade received $3 from her uncle. In the end, Irene had $9 more than Jade. How much did the girls have altogether in the end?
| |
Irene |
Jade |
| Before |
7 u |
9 u |
| Change |
+ 40 |
+ 3 |
| After |
7 u + 40 |
9 u + 3 |
If Jade received another $9 in the end, she would have the same amount of money as Irene.
9 u + 3 + 9 = 7 u + 40
9 u + 12 = 7 u + 40
9 u - 7 u = 40 - 12
2 u = 28
1 u = 28 ÷ 2 = 14
Amount that the girls had in the end
= 7 u + 40 + 9 u + 3
= 7 u + 9 u + 40 + 3
= 16 u + 43
= 16 x 14 + 43
= $267
Answer(s): $267
