document.write( "Question 90427: Solve the system by graphing.
\n" ); document.write( " x – 2y = 8
\n" ); document.write( " x + y = –1
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Algebra.Com's Answer #66784 by mathispowerful(115)\"\" \"About 
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x – 2y = 8
\n" ); document.write( "x + y = –1\r
\n" ); document.write( "\n" ); document.write( "Since the answer must satisfy both equations, the answer must be
\n" ); document.write( "the interception point of two graphs.\r
\n" ); document.write( "\n" ); document.write( "see graph below\r
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\n" ); document.write( "\n" ); document.write( "\"graph%28200%2C200%2C+-5%2C+5%2C+-5%2C+5%2C+0.5%2Ax-4%2C+-1-x%29\"\r
\n" ); document.write( "\n" ); document.write( "from the graph we can see interception point is (2, -3)\r
\n" ); document.write( "\n" ); document.write( "so the answer is x = 2, y = -3
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