document.write( "Question 873173: What the substitution method for 4x-3y=-1 and 3x-y=-2 \n" ); document.write( "

Algebra.Com's Answer #526671 by mananth(16946) $\"\"$ $\"About$

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3 x - y = 2 .............1
\n" ); document.write( "-1 y = 2 -3 x
\n" ); document.write( "/ -1 =
\n" ); document.write( " y = -2 + 3 x
\n" ); document.write( "4 x + -3 y = -1 .....................2
\n" ); document.write( "Substitute y in (2)
\n" ); document.write( "4 x + -3 ( -2 + 3 x ) = -1
\n" ); document.write( "4 x + 6 + -9 x = -1
\n" ); document.write( "4 x -9 x = -7
\n" ); document.write( "-5 x = -7
\n" ); document.write( "/ -5
\n" ); document.write( "x= 7/ 5
\n" ); document.write( "Plug the value of x in (1)
\n" ); document.write( "3 x - y = 2
\n" ); document.write( "3 * 7/ 5 - y = 2
\n" ); document.write( "21/ 5 - y = 2
\n" ); document.write( "-1 y = -11/ 5
\n" ); document.write( "/ -1
\n" ); document.write( "y= 11/ 5
\n" ); document.write( "m.ananth@hotmail.ca
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