document.write( "Question 807188: Solve each system by addition, if possible. \r
\n" ); document.write( "\n" ); document.write( "x + 2y = -9
\n" ); document.write( "x - 2y = -1
\n" ); document.write( "------------------
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Algebra.Com's Answer #486212 by Alan3354(69443)\"\" \"About 
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\n" ); document.write( "x + 2y = -9
\n" ); document.write( "x - 2y = -1
\n" ); document.write( "------------------ Add them
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