Question 554957
{{{2/3 - x/5 < 4/5}}}
{{{- x/5 < 4/5-2/3}}}
{{{- x/5 < (12-10)/15}}}
{{{- x/5 < 2/15}}}
Multiply by -5 both sides
{{{(-5)(-x/5)<(-5)(2/15)}}}
{{{cross(-5)(-x/cross(5)) < cross(-5)(2/cross(15))}}}
{{{x < -2/3}}}