posted by Catherine on .
Alec, Kate and Ketan are roommates who share living expenses in a ratio of
k: 2a: 5k
respectively. If their total expenses each month equal $1400, how much is Ketan's monthly contribution?
Please help! I have no idea how to do this.
k+2a+5k = 1400
6k+2a = 1400
1400/(2a+6k) = 1
multiplying by 5k, we get
7000k/(2a+6k) = 5k
To check, plug in something simple like k=100 and see what you get.