Question 885337
{{{(2z-5)/(z -5) = z-7}}}
    2z -5 = z^2 - 12z + 35
 z^2 - 14z + 40
(z-10)(z-4) = 0, z = 10, Liza present age.  Lani is 20
and
 15/5 = 3