document.write( "Question 1035788: Use the substitution method to solve m - n = 7 and 3m + 2n = 6. \n" ); document.write( "
Algebra.Com's Answer #650427 by fractalier(6550)![]() ![]() You can put this solution on YOUR website! Okay, from \n" ); document.write( "m - n = 7 and 3m + 2n = 6, \n" ); document.write( "we solve the first one for m, \n" ); document.write( "m = n + 7 \and substitute that into the second one, like this... \n" ); document.write( "3(n+7) + 2n = 6 \n" ); document.write( "3n + 21 + 2n = 6 \n" ); document.write( "5n + 21 = 6 \n" ); document.write( "5n = -15 \n" ); document.write( "n = -3 \n" ); document.write( "Now m = n+7 = -3 + 7 = 4 \n" ); document.write( " |