SOLUTION: The ratio of Karla's age to Mike's age is 3:4. Two years ago, their average age was 12 years. How old is Karla now?

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Question 835786: The ratio of Karla's age to Mike's age is 3:4. Two years ago, their average age was 12 years. How old is Karla now?


Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.K%2FM=3%2F4
Two years ago,
%28%28K-2%29%2B%28M-2%29%29%2F2=12
K%2BM-4=24
2.K%2BM=28
Substitute from eq. 1,
%283%2F4%29M%2BM=28
%287%2F4%29M=48
M=28%284%2F7%29
M=16
K=%283%2F4%29%2816%29=12