document.write( "Question 164198: . Solve by substitution or elimination method:
\n" ); document.write( " 7x - 5y = 14
\n" ); document.write( " -4x + y = 27
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Algebra.Com's Answer #120997 by Fombitz(32388)\"\" \"About 
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1.\"7x+-+5y+=+14\"
\n" ); document.write( " 2.\"-4x+%2B+y+=+27\"
\n" ); document.write( "Multiply eq. 2 by 5 and add to eq. 1,
\n" ); document.write( "\"%287x-5y%29%2B5%28-4x%2By%29=14%2B5%2827%29\"
\n" ); document.write( "\"%287x-5y%29%2B%28-20x%2B5y%29=149\"
\n" ); document.write( "\"-13x=149\"
\n" ); document.write( "\"highlight%28x=-149%2F13%29\"
\n" ); document.write( "From eq. 2,
\n" ); document.write( "2.\"-4x+%2B+y+=+27\"
\n" ); document.write( "\"-4%28-149%2F13%29+%2B+y+=+27\"
\n" ); document.write( "\"596%2F13%2B+y+=+27\"
\n" ); document.write( "\"y=27-596%2F13\"
\n" ); document.write( "\"y=351%2F13-596%2F13\"
\n" ); document.write( "\"highlight%28y=-245%2F13%29\"
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