Jack had $146 more than Tom. After Tom gave $128 to Jack, Jack had 4 times as much money as Tom. How much money did Jack have at first?
| |
Jack |
Tom |
Comparing between
Jack and Tom
at first |
$146 more |
|
| Before |
4 u - $128 |
1 u + $128 |
| Change |
+ $128 |
- $128 |
| After |
4 u |
1 u |
Jack had $146 more than Tom at first. If Tom had another $146 at first, both of them would had the same amount of money.
4 u - 128 = 1 u + 128 + 146
4 u - 128 = 1 u + 274
4 u - 1 u = 128 + 274
3 u = 402
1 u = 402 ÷ 3 = 134
Amount that Jack had at first
= 4 u - 128
= 4 x 134 - 128
= 536 - 128
= $408
Answer(s): $408
