Gabby and Gwen had $61 at first. Gabby spent
58 of her money and Gwen spent
45 of her money. Given that they had $22 left, how much did Gabby have at first?
|
Gabby |
Gwen |
Total |
Before |
8 u |
5 p |
$61 |
Change |
- 5 u |
- 4 p |
|
After |
3 u |
1 p |
$22 |
8 u + 5 p = 61 --- (1)
3 u + 1 p = 22 --- (2)
(2) x 5 15 u + 5 p = 110 --- (3)
(3) - (1)
15 u - 8 u = 110 - 61
7 u = 49
1 u = 49 ÷ 7 = 7
Amount that Gabby had at first
= 8 u
= 8 x 7
= $56
Answer(s): $56