Question 1170661
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Here is a completely different way to solve this kind of problem....<br>
Start with the fact that 9 years ago Julia's age was 3 times Ken's age.  We can then say that their ages 9 years ago were 3x and x.<br>
The difference between their ages 9 years ago is then 3x-x=2x.  But we know the difference between their ages is (and always was/will be) 64.<br>
So 2x=64; x=32; and their ages 9 years ago were 3x=96 and x=32.<br>
Since that was 9 years ago, Ken's age is now 32+9=41.<br>
ANSWER: Ken is 41<br>