document.write( "Question 398107: A two digit number is 4 times the sum of its digits and twice the product of its digit.FIND THE NUMBER \n" ); document.write( "
Algebra.Com's Answer #282196 by ankor@dixie-net.com(22740)\"\" \"About 
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two digits, x & y
\n" ); document.write( "10x + y = the number
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\n" ); document.write( " A two digit number is 4 times the sum of its digits
\n" ); document.write( "10x + y = 4(x+y)
\n" ); document.write( "10x + y = 4x + 4y
\n" ); document.write( "10x - 4x = 4y - y
\n" ); document.write( "6x = 3y
\n" ); document.write( "divide both sides by 3
\n" ); document.write( "2x = y\r
\n" ); document.write( "\n" ); document.write( " \" and twice the product of its digit.\"
\n" ); document.write( "10x + y = 2xy
\n" ); document.write( "Replace y with 2x
\n" ); document.write( "10x + 2x = 2*x*2x
\n" ); document.write( "12x = 4x^2
\n" ); document.write( "Divide both sides by 4x
\n" ); document.write( "3 = x
\n" ); document.write( "then
\n" ); document.write( "y = 2(3)
\n" ); document.write( "y = 6
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\n" ); document.write( "the number = 36
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\n" ); document.write( "You can confirm this in both statement:
\n" ); document.write( "36 = 4(3+6)
\n" ); document.write( "and
\n" ); document.write( "36 = 2(3*6)\r
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