document.write( "Question 215309: The sum of thre numbers is 40. One number is 5 more than the second number. It is twice the third number. What are the numbers. \n" ); document.write( "
Algebra.Com's Answer #162689 by ankor@dixie-net.com(22740)\"\" \"About 
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The sum of three numbers is 40.
\n" ); document.write( "x + y + z = 40
\n" ); document.write( ":
\n" ); document.write( " One number is 5 more than the second number.
\n" ); document.write( "x = y + 5
\n" ); document.write( "or
\n" ); document.write( "y = x - 5
\n" ); document.write( ":
\n" ); document.write( "It is twice the third number.
\n" ); document.write( "x = 2z
\n" ); document.write( "or
\n" ); document.write( "z = .5x
\n" ); document.write( ":
\n" ); document.write( "What are the numbers.
\n" ); document.write( ":
\n" ); document.write( "Substitute for y & z
\n" ); document.write( "x + (x-5) + .5x = 40
\n" ); document.write( "x + x + .5x = 40 + 5
\n" ); document.write( "2.5x = 45
\n" ); document.write( "x = \"45%2F2.5\"
\n" ); document.write( "x = 18
\n" ); document.write( "then
\n" ); document.write( "y = 18-5
\n" ); document.write( "y = 13
\n" ); document.write( "and
\n" ); document.write( "z = .5(18)
\n" ); document.write( "z = 9
\n" ); document.write( ":
\n" ); document.write( "Check: 18 + 13 + 9 = 40 \n" ); document.write( "
\n" );