document.write( "Question 461139: what is the substitution method of x+3y=3
\n" ); document.write( " 2x-4y=6 \n" ); document.write( "
Algebra.Com's Answer #316330 by mananth(16946)\"\" \"About 
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1 x + 3 y = 3 .............1
\n" ); document.write( "-4 y = 6 -2 x ---------2
\n" ); document.write( "/ -4 =
\n" ); document.write( " y = -1.5 + 0.5 x
\n" ); document.write( "Substitute y in (1)
\n" ); document.write( "1 x + 3 ( -1.5 + 0.5 x ) = 3
\n" ); document.write( "1 x -4.5 + 1.5 x = 3
\n" ); document.write( "1 x + 1.5 x = 3 4.5
\n" ); document.write( "2.5 x = 7.5
\n" ); document.write( "/ 2.5
\n" ); document.write( "x= 3
\n" ); document.write( "Plug the value of x in (1)
\n" ); document.write( "1 x + 3 y = 3
\n" ); document.write( "1 * 3 + 3 y = 3
\n" ); document.write( "3 + 3 y = 3
\n" ); document.write( "3 y = 0
\n" ); document.write( "/ 3
\n" ); document.write( "y= 0 \r
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