Question 727383: The ratio of the present ages of Kwasi and Yaw is 2:9. Four years ago, the sum of their ages was 47 years. How old is Yaw now? Answer by lwsshak3(11628) (Show Source):
You can put this solution on YOUR website! The ratio of the present ages of Kwasi and Yaw is 2:9. Four years ago, the sum of their ages was 47 years. How old is Yaw now?
**
let k=Kwasi's present age
let y=Yaw's present age
..
k/y=2/9
k=2y/9
..
4 yrs ago:
k-4+y-4=47
k+y=55
..
2y/9+y=55
2y+9y=9*55
11y=9*55
y=9*5=45
k=55-y=10
Kwasi's present age=10
Yaw's present age=45
(