Mark had $44 more than Betty. After Betty spent
17 of her money, Mark had thrice as much money as Betty. How much money did Mark have at first?
| |
Mark |
Betty |
| Before |
18 u |
7 u |
| Change |
|
- 1 u |
| After |
18 u |
6 u |
Amount that Mark had in the end
= 3 x 6 u
= 18 u
If Betty had another $44 at first, the amounts that Mark and Betty each had at first will be the same.
18 u = 7 u + 44
18 u - 7 u = 44
11 u = 44
1 u = 44 ÷ 11 = 4
Amount Mark had at first
= 18 u
= 18 x 4
= $72
Answer(s): $72
