document.write( "Question 924879: x+y=10
\n" ); document.write( "y=4x
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Algebra.Com's Answer #561140 by ewatrrr(24785)\"\" \"About 
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y=\"4x\"
\n" ); document.write( "x+y=10 Substitute for y
\n" ); document.write( "x + 4x = 10
\n" ); document.write( "5x = 10
\n" ); document.write( "x = 2
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