Michael had three times as much money as David. After Michael spent $120 and David spent $36, they had the same amount of money left.
- How much did David have at first?
- How much had each of them left in the end?
|
Michael |
David |
Before |
3 u |
1 u |
Change |
- 120 |
- 36 |
After |
3 u - 120 |
1 u - 36 |
The amounts that Michael and David had left in the end is the same.
3 u - 120 = 1 u - 36
3 u - 1 u = 120 - 36
2 u = 84
1 u = 84 ÷ 2 = 42
Amount that David had at first
= 1 u
= $42
(a)
Amount that each of them had in the end
= 42 - 36
= $6
Answer(s): (a) $42; (b) $6