document.write( "Question 1189990: x+2y=-1
\n" ); document.write( "4x-4y=20\r
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Algebra.Com's Answer #821518 by Alan3354(69443)\"\" \"About 
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x+2y=-1
\n" ); document.write( "4x-4y=20
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\n" ); document.write( "And? If you want to solve for x & y, you should say, \"Solve for x & y\"
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\n" ); document.write( "x+2y=-1
\n" ); document.write( "4x-4y=20 ---> x - y = 5
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\n" ); document.write( "x + 2y=-1
\n" ); document.write( "x - y = 5
\n" ); document.write( "--------------------------- Subtract
\n" ); document.write( "3y = -6
\n" ); document.write( "y = -2
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\n" ); document.write( "x - y = 5
\n" ); document.write( "x + 2 = 5
\n" ); document.write( "x = 3\r
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