Mr Ng had $626 more than Mr Zhang at first. After Mr Zhang had spent $492, Mr Ng had 3 times as much money as Mr Zhang. Find the amount of money Mr Ng had at first.
| |
Mr Zhang |
Mr Ng |
Comparing Mr Zhang
and Mr Ng at first |
|
$626 more |
| Before |
1 u + $492 |
3 u |
| Change |
- $492 |
|
| After |
1 u |
3 u |
Mr Ng had $626 more than Mr Zhang at first. If another $626 is given to Mr Zhang at first, both will have the same amount at first.
3 u = 1 u + 492 + 626
3 u = 1 u + 1118
3 u - 1 u = 1118
2 u = 1118
1 u = 1118 ÷ 2 = 559
Amount that Mr Ng had at first
= 3 u
= 3 x 559
= $1677
Answer(s): $1677
