document.write( "Question 936705: The system of equations is coincident.
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\n" ); document.write( "What are the missing values?\r
\n" ); document.write( "\n" ); document.write( "3x+y=7
\n" ); document.write( "9x+__y=__
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Algebra.Com's Answer #570176 by TimothyLamb(4379)\"\" \"About 
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3x + y = 7
\n" ); document.write( "3(3x + y = 7)
\n" ); document.write( "9x + 3y = 21
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\n" ); document.write( "the missing values are:
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\n" ); document.write( "21
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