document.write( "Question 447231: solve by substitution
\n" ); document.write( "8x+4y=4
\n" ); document.write( "9x-4y=-38 \n" ); document.write( "
Algebra.Com's Answer #307945 by mananth(16946)\"\" \"About 
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8x+4y=4 .............1
\n" ); document.write( "rewrite the second equation
\n" ); document.write( "4y=38+9x---------2
\n" ); document.write( "/4
\n" ); document.write( "y=9.5+2.25x
\n" ); document.write( "substitute the value of y in (1)
\n" ); document.write( "8x+4(9.5+2.25x)=4
\n" ); document.write( "8x+38+9x=4
\n" ); document.write( "8x+9x=4-38
\n" ); document.write( "17x=-34
\n" ); document.write( "/17
\n" ); document.write( "x=-2
\n" ); document.write( "Plug the value of x in (1)
\n" ); document.write( "8x+4y=4
\n" ); document.write( "8*-2+4y=4
\n" ); document.write( "-16+4y=4
\n" ); document.write( "4y=20
\n" ); document.write( "/4
\n" ); document.write( "y=5
\n" ); document.write( " \n" ); document.write( "
\n" );