In the equation 1/j + 1/k = 2/3, both j and k are positive integers. What is the sum of all possible values for k?
$\frac{j+k}{jk} = \frac{2}{3}$
$3j + 3k = 2jk$
$3j - 2jk + 3k = 0.$
Here is the graph: https://www.desmos.com/calculator/u6uyo6fqj3
Consider asymptotes and reflections. LMK if you have any more questions.