document.write( "Question 714664: Can you help me to understand how to apply the substitutive method \n" ); document.write( "

Algebra.Com's Answer #438928 by mananth(16946) $\"\"$ $\"About$

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\n" ); document.write( "Make y the subject in the first equation and substitute in equation (2)
\n" ); document.write( "-2 x + 1 y = -2 .............1 y = -2 + 2 x
\n" ); document.write( "3 x + 4 y = 3 .....................2
\n" ); document.write( "Substitute y in (2)
\n" ); document.write( "3x+ 4 ( -2 + 2 x ) = 3
\n" ); document.write( "3 x + -8 + 8 x = 3
\n" ); document.write( "3 x 8 x = 11
\n" ); document.write( "11 x = 11
\n" ); document.write( "/ 11
\n" ); document.write( "x= 1
\n" ); document.write( "Plug the value of x in (1)
\n" ); document.write( "-2 x + 1 y = -2
\n" ); document.write( "-2 * 1 + 1 y = -2
\n" ); document.write( "-2 + 1 y = -2
\n" ); document.write( "y = 0
\n" ); document.write( "
\n" ); document.write( "m.ananth@hotmail.ca
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