Kimberly and Fanny had $72 at first. Kimberly spent
58 of her money and Fanny spent
34 of her money. Given that they had $20 left, how much did Kimberly have at first?
| |
Kimberly |
Fanny |
Total |
| Before |
8 u |
4 p |
$72 |
| Change |
- 5 u |
- 3 p |
|
| After |
3 u |
1 p |
$20 |
8 u + 4 p = 72 --- (1)
3 u + 1 p = 20 --- (2)
(2) x 4 12 u + 4 p = 80 --- (3)
(3) - (1)
12 u - 8 u = 80 - 72
4 u = 8
1 u = 8 ÷ 4 = 2
Amount that Kimberly had at first
= 8 u
= 8 x 2
= $16
Answer(s): $16
