SOLUTION: where do i start with this equation: 3m-n=-8 m+2n=9

Question 48742: where do i start with this equation:
3m-n=-8
m+2n=9

Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
3M-N=-8 NOW MULTIPLY THE SECOND EQUATION BY -3 & WE GET -3M-6N=-27 NOW ADD
-3M-6N=-27
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0M-7N=-35 OR 7N=35 OR N=5 SUBSTITUTING 5 FOR N IN EQUATION - WE GET
3M-5=-8 OR 3M=-3 OR M=-1
PROOF -1+2*5=9 OR -1+10=9 OR 9=9
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