document.write( "Question 726149: Solve this system of equations using either addition or substitution.\r
\n" ); document.write( "\n" ); document.write( "2m=n-3
\n" ); document.write( "3m=2n-9\r
\n" ); document.write( "\n" ); document.write( "Please provide a check.\r
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\n" ); document.write( "\n" ); document.write( "THANKS IN ADVANCE. I TOTALLY APPERICIATE YOU TAKING THE TIME TO HELP ME.
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Algebra.Com's Answer #444492 by checkley79(3341)\"\" \"About 
You can put this solution on YOUR website!
2m=n-3 MULTIPLY BY -2 & ADD.
\n" ); document.write( "3m=2n-9
\n" ); document.write( "-4m=-2n+6
\n" ); document.write( "----------------
\n" ); document.write( "-m=-3
\n" ); document.write( "m=3 ans.
\n" ); document.write( "2*3=n-3
\n" ); document.write( "6=n-3
\n" ); document.write( "n=6+3
\n" ); document.write( "n=9 ans.
\n" ); document.write( "Proof:
\n" ); document.write( "3*3=2*9-9
\n" ); document.write( "9=18-9
\n" ); document.write( "9=9
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