Question 745511
{{{1/5 + 1/x = 1/8}}}

moving terms...


{{{1/5 -1/5+ 1/x = 1/8-1/5}}}


common denominator...

{{{1/x=(1/8)(5/5)-(1/5)(8/8)}}}


{{{1/x=5/40-8/40}}}


{{{1/x=-3/40}}}


taking reciprocal...

{{{x=-40/3}}}