Question 1170661

Ken is 64 years younger than Julia. 9 years ago, Julia's age was 3 times Ken's age. How old is Ken now?
<pre>Let Ken's age be K
Then Julia's is: K + 64
We then get: K + 64 - 9 = 3(K - 9)
K + 55 = 3K - 27
K - 3K = - 27 - 55
- 2K = - 82
Ken's age, or {{{highlight_green(matrix(1,5, K, "=", (- 82)/(- 2), "=", 41))}}}