document.write( "Question 185859: -x+y=1
\n" ); document.write( "x+y=11 \n" ); document.write( "
Algebra.Com's Answer #139392 by checkley77(12844)\"\" \"About 
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-x+y=1
\n" ); document.write( "x+y=11 add these 2 equations.
\n" ); document.write( "-------------
\n" ); document.write( "2y=12
\n" ); document.write( "y=12/2
\n" ); document.write( "y=6 ans.
\n" ); document.write( "-x+6=1
\n" ); document.write( "-x=1-6
\n" ); document.write( "-x=-5
\n" ); document.write( "x=5 ans.
\n" ); document.write( "Proof:
\n" ); document.write( "6+5=11
\n" ); document.write( "11=11 \n" ); document.write( "
\n" );