Yen and Hazel had $32 at first. Yen spent
47 of her money and Hazel spent
23 of her money. Given that they had $42 left, how much did Yen have at first?
| |
Yen |
Hazel |
Total |
| Before |
7 u |
3 p |
$32 |
| Change |
- 4 u |
- 2 p |
|
| After |
3 u |
1 p |
$42 |
7 u + 3 p = 32 --- (1)
3 u + 1 p = 42 --- (2)
(2) x 3 9 u + 3 p = 126 --- (3)
(3) - (1)
9 u - 7 u = 126 - 32
2 u = 94
1 u = 94 ÷ 2 = 47
Amount that Yen had at first
= 7 u
= 7 x 47
= $329
Answer(s): $329
