David had four times as much money as Tommy. After David spent $128 and Tommy spent $23, they had the same amount of money left.
- How much did Tommy have at first?
- How much had each of them left in the end?
|
David |
Tommy |
Before |
4 u |
1 u |
Change |
- 128 |
- 23 |
After |
4 u - 128 |
1 u - 23 |
The amounts that David and Tommy had left in the end is the same.
4 u - 128 = 1 u - 23
4 u - 1 u = 128 - 23
3 u = 105
1 u = 105 ÷ 3 = 35
Amount that Tommy had at first
= 1 u
= $35
(a)
Amount that each of them had in the end
= 35 - 23
= $12
Answer(s): (a) $35; (b) $12