document.write( "Question 536367: a number of two digit is such that four time the unit digit is 5 greather than thrice the ten digit when the digit are reversed, the number is increased by 9. find the number. \n" ); document.write( "
Algebra.Com's Answer #352332 by mananth(16946)\"\" \"About 
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Let xy be the number x in ten's place and y in units place\r
\n" ); document.write( "\n" ); document.write( "4y=3x+5
\n" ); document.write( "4y-3x=5................(1)\r
\n" ); document.write( "\n" ); document.write( "10y+x= 10x+y+9
\n" ); document.write( "9y-9x=9
\n" ); document.write( "/9
\n" ); document.write( "y-x=1...................(2)\r
\n" ); document.write( "\n" ); document.write( "-3 x + 4 y = 5 .............1
\n" ); document.write( "-1 x + 1 y = 1 .............2
\n" ); document.write( "Eliminate y
\n" ); document.write( "multiply (1)by -1
\n" ); document.write( "Multiply (2) by 4
\n" ); document.write( "3 x -4 y = -5
\n" ); document.write( "-4 x + 4 y = 4
\n" ); document.write( "Add the two equations
\n" ); document.write( "-1 x = -1
\n" ); document.write( "/ -1
\n" ); document.write( "x = 1
\n" ); document.write( "plug value of x in (1)
\n" ); document.write( "-3 x + 4 y = 5
\n" ); document.write( "-3 + 4 y = 5
\n" ); document.write( " 4 y = 5 + 3
\n" ); document.write( " 4 y = 8
\n" ); document.write( " y = 2
\n" ); document.write( "The number is 12\r
\n" ); document.write( "\n" ); document.write( "m.ananth@hotmail.ca
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