document.write( "Question 704003: Y = -x +4
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Algebra.Com's Answer #433847 by Alan3354(69443)\"\" \"About 
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Y = -x +4
\n" ); document.write( "Y = 3x
\n" ); document.write( "Substitution
\n" ); document.write( "---------------
\n" ); document.write( "Sub for y in the 1st equation
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