Question 827651
{{{X+X>X}}} is not true for
{{{X=0}}} , in which case {{{X+X=0+0=0=X}}} , and {{{X+X=X}}} .
It is not true for {{{X=-1}}} either, because
in that case {{{X+X=-1+(-1)=-2<-1=X}}} so in that case {{{X+X<X}}} .
 
{{{abs(X+3)=abs(X)+3}}} is not true for any negative {{{X}}}.
In particular, for {{{X=-1}}} ,
{{{abs(X+3)=abs(-1+3)=abs(2)=2}}} , while
{{{abs(X)+3=abs(-1)+3=1+3=4}}} ,
so in the case of {{{X=-1}}} , {{{abs(X+3)=2<>4=abs(X)+3}}} .