document.write( "Question 862048: Use the substitution method to solve the system of equations. Please show all work!
\n" ); document.write( "m - n = 7;
\n" ); document.write( "3m + 2n = 6
\n" ); document.write( "

Algebra.Com's Answer #519432 by Help Math(4)\"\" \"About 
You can put this solution on YOUR website!
m - n = 7 (1)
\n" ); document.write( "3m + 2n = 6 (2)\r
\n" ); document.write( "\n" ); document.write( "solve for m from (1)\r
\n" ); document.write( "\n" ); document.write( "m=7+n (3)\r
\n" ); document.write( "\n" ); document.write( "now substitute (3) into (2) for m \r
\n" ); document.write( "\n" ); document.write( "3(7+n)+2n=6\r
\n" ); document.write( "\n" ); document.write( "21+3n+2n=6
\n" ); document.write( "21+5n=6\r
\n" ); document.write( "\n" ); document.write( "5n=6-21
\n" ); document.write( "n=-15/4
\n" ); document.write( "n=-3\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "no plug n=-3 into (1)
\n" ); document.write( "m - (-3) = 7
\n" ); document.write( "m=4
\n" ); document.write( "
\n" );