David and Mark received a total of $408. After David spent
67 of his money and Mark spent
45 of his money, Mark had 2 times as much money as David. How much money did Mark have at first?
| |
David |
Mark |
Total |
Before |
7 u |
5x2 =
10 u |
17 u |
Change |
- 6 u |
- 4x2 =
- 8 u |
|
After |
1 u |
1x2 =
2 u |
|
Comparing David
and Mark in the end |
1 u |
2 u |
|
The amount that Mark had in the end is the same. Make the amount that Mark had in the end the same. LCM of 1 and 2 is 2.
Total amount that Mark and David had at first
= 7 u + 10 u
= 17 u
17 u = 408
1 u = 408 ÷ 17 = 24
Amount that Mark had at first
= 10 u
= 10 x 24
= $240
Answer(s): $240
