document.write( "Question 541036: the sum of three numbers is 20. the second number is 4 times the first, and the sun of the first and third is 8 \n" ); document.write( "
Algebra.Com's Answer #354004 by oberobic(2304)\"\" \"About 
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Three numbers: x, y, z.
\n" ); document.write( "y = 4x
\n" ); document.write( "x+z = 8
\n" ); document.write( "z = 8-x
\n" ); document.write( ".
\n" ); document.write( "x+y+z = 20
\n" ); document.write( ".
\n" ); document.write( "substitute
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\n" ); document.write( "x +4x +8-x = 20
\n" ); document.write( "4x = 12
\n" ); document.write( "x = 3
\n" ); document.write( "y = 4*3 = 12
\n" ); document.write( "z = 8-3 = 5
\n" ); document.write( ".
\n" ); document.write( "Done. \n" ); document.write( "
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