Question 722984
Your assignment instruction for ab seems strange.  Let me try n/d instead.


{{{(n+1)/(d+1)=35}}} and {{{(n-1)/(d-1)=59}}}.


The +1 equation gives
n+1=35(d+1)
n+1=35d+35
{{{n-35d=34}}}.


The -1 equation gives
n-1=59(d-1)
n-1=59d-59
{{{n-59d=-60}}}


Subtracting the -60 equation from the +34 equation gives us:
(59-34)d=94
25d=94
{{{d=3.76}}}  and using in the +1 equation result gives {{{n=165.6}}}


Your fraction, as n/d, should be {{{165.6/3.76=44.0425532}}}