Question 926092


IF {{{A(X-Y)=0}}},THEN 

(1){{{A=0}}} ....IS ALWAYS TRUE because {{{0(X-Y)}}} is = {{{0}}} for any value of {{{x}}} or {{{y}}}

and 
(3){{{X=Y}}} ..IS ALWAYS TRUE because {{{A(X-Y)=A(X-X)=A*0}}} is = {{{0}}} for any value of {{{A}}}