document.write( "Question 621818: solve the system of equations by the addition method\r
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\n" ); document.write( " 9x+y=3
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Algebra.Com's Answer #391008 by Alan3354(69443)\"\" \"About 
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\n" ); document.write( "-3y-y=3
\n" ); document.write( " 9x+y=3
\n" ); document.write( "----------- Add
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