document.write( "Question 705798: x+y=1 -2x+y=4 \n" ); document.write( "
Algebra.Com's Answer #434799 by checkley79(3341)\"\" \"About 
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x+y=1 MULTIPLY BY 2 & ADD.
\n" ); document.write( "-2x+y=4
\n" ); document.write( "2X+2Y=2
\n" ); document.write( "--------------
\n" ); document.write( "3Y=6
\n" ); document.write( "Y=6/3
\n" ); document.write( "Y=2 ANS.
\n" ); document.write( "X+2=1
\n" ); document.write( "X=1-2
\n" ); document.write( "X=-1 ANS.
\n" ); document.write( "PROOF:
\n" ); document.write( "-2*-1+2=4
\n" ); document.write( "2+2=4
\n" ); document.write( "4=4 \n" ); document.write( "
\n" );