document.write( "Question 548133: solve by substitution
\n" ); document.write( "2x + 4y = 8
\n" ); document.write( "-2x + y = 12 \n" ); document.write( "

Algebra.Com's Answer #356720 by mananth(16946) $\"\"$ $\"About$

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2 x + 4 y = 8 .............1
\n" ); document.write( "1 y = 12 + 2 x ---------2
\n" ); document.write( "/ 1 =
\n" ); document.write( " y = 12 + 2 x
\n" ); document.write( "Substitute y in (1)
\n" ); document.write( "2 x + 4 ( 12 + 2 x ) = 8
\n" ); document.write( "2 x + 48 + 8 x = 8
\n" ); document.write( "2 x + 8 x = 8 -48
\n" ); document.write( "10 x = -40
\n" ); document.write( "/ 10
\n" ); document.write( "x= -4
\n" ); document.write( "Plug the value of x in (1)
\n" ); document.write( "2 x + 4 y = 8
\n" ); document.write( "2 * -4 + 4 y = 8
\n" ); document.write( "-8 + 4 y = 8
\n" ); document.write( "4 y = 16
\n" ); document.write( "/ 4
\n" ); document.write( "y= 4
\n" ); document.write( "m.ananth@hotmail.ca
\n" ); document.write( " \n" ); document.write( "

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