Oscar and Harry had $315 altogether. After Oscar spent
15 of his money and Harry spent
78 of his money, Oscar was left with twice as much money as Harry. How much money did Harry have at first?
| |
Oscar |
Harry |
Total |
| Before |
5x1 =
5 u |
8x2 =
16 u |
$315 |
| Change |
- 1x1 =
- 1 u |
- 7x2 =
- 14 u |
|
| After |
4x1 =
4 u |
1x2 =
2 u |
|
Comparing Oscar
and Harry in the end |
2x2 =
4 u |
1x2 =
2 u |
|
The amount that Oscar had in the end is repeated. Make the amount that Oscar had in the end the same. LCM of 4 and 2 is 4.
Total amount that Oscar and Harry had at first
= 5 u + 16 u
= 21 u
21 u = 315
1 u = 315 ÷ 21 = 15
Amount that Harry had at first
= 16 u
= 16 x 15
= $240
Answer(s): $240
