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)![]() ![]() ![]() 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( " |