Question 43470
When you have fractions, a good way to do it is to put them into the same denominator and solve:

{{{13/(y-1) -3 = 1/(y-1)}}}

{{{13/(y-1) - 3(y-1)/(y-1) = 1/(y-1)}}}

{{{13/cross(y-1) - 3(y-1)/cross(y-1) = 1/cross(y-1)}}}

{{{13 - 3(y-1) = 1}}}

{{{13 - 3y - 3 = 1}}}

{{{-3y = -13 - 3 + 1}}}

{{{-3y = -15}}}

{{{-y = -5}}}

{{{y = 5}}}