Xavier and Fabian have the same amount of money. If Xavier spends $43 a day and Fabian spends $14 a day, Fabian will have $319 when Xavier uses up all his money. If Xavier spends $18 a day and Fabian spends $43 a day, how much will Xavier have left when Fabian uses up all his money?
| |
Case 1 |
Case 2 |
| |
Xavier |
Fabian |
Xavier |
Fabian |
| Before |
43 u |
14 u + $319 |
43 u |
43 u |
| Change |
- 43 u |
- 14 u |
- 18 u |
- 43 u |
| After |
0 |
$319 |
25 u |
0 |
The amounts that Xavier and Fabian have at first are the same.
43 u = 14 u + 319
43 u - 14 u = 319
29 u = 319
1 u = 319 ÷ 29 = 11
Amount that Xavier will have left when Fabian uses up all his money
= 43 u - 18 u
= 25 u
= 25 x 11
= $275
Answer(s): $275
