document.write( "Question 916982: The sum of two numbers is 12.if two times the added to three times the second is equal to 21,find the numbers. \n" ); document.write( "

Algebra.Com's Answer #556448 by mananth(16946) $\"\"$ $\"About$

You can put this solution on YOUR website!
x= one number
\n" ); document.write( "y= other number
\n" ); document.write( "
\n" ); document.write( "1 x + 1 y = 12 .............1
\n" ); document.write( "
\n" ); document.write( "2 x + 3 y = 21 .............2
\n" ); document.write( "Eliminate y
\n" ); document.write( "multiply (1)by -3
\n" ); document.write( "Multiply (2) by 1
\n" ); document.write( "-3 x -3 y = -36
\n" ); document.write( "2 x + 3 y = 21
\n" ); document.write( "Add the two equations
\n" ); document.write( "-1 x = -15
\n" ); document.write( "/ -1
\n" ); document.write( "x = 15
\n" ); document.write( "plug value of x in (1)
\n" ); document.write( "1 x + 1 y = 12
\n" ); document.write( "15 + y = 12
\n" ); document.write( " y = 12
\n" ); document.write( " y = -3
\n" ); document.write( " y = -3
\n" ); document.write( "x= 15 one number
\n" ); document.write( "y= -3 other number
\n" ); document.write( "m.ananth@hotmail.ca
\n" ); document.write( " \n" ); document.write( "

\n" );