document.write( "Question 261892: solve for x and y\r
\n" ); document.write( "\n" ); document.write( "2x-y=-1
\n" ); document.write( " y=2x
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Algebra.Com's Answer #192996 by richwmiller(17219)\"\" \"About 
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they are parallel. so they do not cross and therefore have no solution
\n" ); document.write( "2x-y=-1
\n" ); document.write( "y=2x
\n" ); document.write( "substitute
\n" ); document.write( "2x-2x=-1
\n" ); document.write( " 0=-1
\n" ); document.write( "that can't be
\n" ); document.write( "therefore there is no solution
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