Question 467122


{{{X+Y=2}}}
{{{Y-X=2}}}
-----------....add

{{{X-X+Y+Y=2+2}}}

{{{2Y=4}}}


{{{Y=4/2}}}


{{{Y=2}}}

now find {{{X}}}

{{{X+Y=2}}}

{{{X+2=2}}}

{{{X=2-2}}}

{{{X=0}}}