document.write( "Question 817064: Solve this system by substitution:
\n" ); document.write( "-3x+3y=4 and -x+y=3 \n" ); document.write( "
Algebra.Com's Answer #491862 by mananth(16946)\"\" \"About 
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-1 x + 1 y = 3 .............1
\n" ); document.write( "1 y = 3 + 1 x
\n" ); document.write( "/ 1 =
\n" ); document.write( " y = 3 + 1 x
\n" ); document.write( "3 x + 3 y = 4 .....................2
\n" ); document.write( "Substitute y in (2)
\n" ); document.write( "3 x + 3 ( 3 + 1 x ) = 4
\n" ); document.write( "3 x + 9 + 3 x = 4
\n" ); document.write( "3 x 3 x = -5
\n" ); document.write( "6 x = -5
\n" ); document.write( "/ 6
\n" ); document.write( "x= - 5/ 6
\n" ); document.write( "Plug the value of x in (1)
\n" ); document.write( "-1 x + 1 y = 3
\n" ); document.write( "-1 * - 5/ 6 + 1 y = 3
\n" ); document.write( " 5/ 6 + 1 y = 3
\n" ); document.write( "y = 2 1/ 6
\n" ); document.write( "y= 13/ 6
\n" ); document.write( "m.ananth@hotmail.ca
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