Tammy and Gwen had $76 at first. Tammy spent
58 of her money and Gwen spent
34 of her money. Given that they had $83 left, how much did Tammy have at first?
| |
Tammy |
Gwen |
Total |
| Before |
8 u |
4 p |
$76 |
| Change |
- 5 u |
- 3 p |
|
| After |
3 u |
1 p |
$83 |
8 u + 4 p = 76 --- (1)
3 u + 1 p = 83 --- (2)
(2) x 4 12 u + 4 p = 332 --- (3)
(3) - (1)
12 u - 8 u = 332 - 76
4 u = 256
1 u = 256 ÷ 4 = 64
Amount that Tammy had at first
= 8 u
= 8 x 64
= $512
Answer(s): $512
