Question 5916
{{{1 - (2/3y) = 23 - (1/15y)}}}  --> multiply every term by 15y, since this is the LCF of all the denominators:


{{{1*15y - 15y(2/3y) = 23(15y) - 15y(1/15y)}}}
{{{15y - 10 = 345y - 1}}}
-9 = 330y
y = -9/330
y = -3/110


jon.