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)\"\" \"About 
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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
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