document.write( "Question 452242: Can I please have some help with the following
\n" ); document.write( "3x+9y=21
\n" ); document.write( "-8x+y=19\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "7m+n=1
\n" ); document.write( "m-2n=13 \n" ); document.write( "
Algebra.Com's Answer #310882 by mananth(16949)\"\" \"About 
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3x+9y=21 .............1
\n" ); document.write( "-8x+y=19 .............2
\n" ); document.write( "Eliminate y
\n" ); document.write( "multiply (1)by 1
\n" ); document.write( "Multiply (2) by -9
\n" ); document.write( "3x+9y=21
\n" ); document.write( "72x-9y=-171
\n" ); document.write( "Add the two equations
\n" ); document.write( "75x= -150
\n" ); document.write( "/75
\n" ); document.write( "x=-2
\n" ); document.write( "plug value of x in (1)
\n" ); document.write( "3x+9y=21
\n" ); document.write( "-6+9y=21
\n" ); document.write( "9y=21+6
\n" ); document.write( "9y=27
\n" ); document.write( "y=3
\n" ); document.write( "................... \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "7m+n=1 .............1
\n" ); document.write( "m-2n=13 .............2
\n" ); document.write( "Eliminate y
\n" ); document.write( "multiply (1)by 2
\n" ); document.write( "Multiply (2) by 1
\n" ); document.write( "14m+2n= 2
\n" ); document.write( "m-2n= 13
\n" ); document.write( "Add the two equations
\n" ); document.write( "15m= 15
\n" ); document.write( "/15
\n" ); document.write( "m= 1
\n" ); document.write( "plug value of m in (1)
\n" ); document.write( "7m+n=1
\n" ); document.write( "7+1n=1
\n" ); document.write( "n=1-7
\n" ); document.write( "n=-6
\n" ); document.write( " \n" ); document.write( "
\n" );