SOLUTION: can you please help me solve by either the substitution or the additon-or-subtraction method: (((2m=n-3 3m-2n-9)))

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Question 154656This question is from textbook Algebra structure and method book 1
: can you please help me solve by either the substitution or the additon-or-subtraction method: (((2m=n-3 3m-2n-9))) This question is from textbook Algebra structure and method book 1

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
(((2m=n-3 3m-2n-9)))
I assume you mean 2 equations:
2m = n-3
3m-2n = 9
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2m - n = -3
3m -2n = 9
Mult by the 1st eqn by 2
4m -2n = -6
Subtract it from the 2nd eqn
-m +0n = -12
m = 12
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Sub into either eqn
2*12 - n = -3
24 - n = -3
-n = -27
n = 27
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