Gabby and Emily had $108 at first. Gabby spent
58 of her money and Emily spent
34 of her money. Given that they had $99 left, how much did Gabby have at first?
| |
Gabby |
Emily |
Total |
| Before |
8 u |
4 p |
$108 |
| Change |
- 5 u |
- 3 p |
|
| After |
3 u |
1 p |
$99 |
8 u + 4 p = 108 --- (1)
3 u + 1 p = 99 --- (2)
(2) x 4 12 u + 4 p = 396 --- (3)
(3) - (1)
12 u - 8 u = 396 - 108
4 u = 288
1 u = 288 ÷ 4 = 72
Amount that Gabby had at first
= 8 u
= 8 x 72
= $576
Answer(s): $576
