document.write( "Question 1013865: what is 2x+y=21 and x-y=6\r
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Algebra.Com's Answer #630171 by fractalier(6550)\"\" \"About 
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From these two equations, we add them to get
\n" ); document.write( "2x+y=21
\n" ); document.write( "x-y=6
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\n" ); document.write( "3x = 27
\n" ); document.write( "x = 9
\n" ); document.write( "y = 3
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