Question 1163591: 2m + n = 0
m + 2n = 3
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! 2m + n = 0
m + 2n = 3
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If you want to solve for m & n, you should say that.
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2m + n = 0
m + 2n = 3
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1 method is substitution:
n = -2m
Sub for n in the 2nd eqn
m + 2*(-2m) = 3
m - 4m = 3
-3m = 3
m = -1
----
n = -2m = +2
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Another method is elimination:
2m + n = 0
m + 2n = 3
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Multiply the 1st eqn by 2:
4m + 2n = 0
m + 2n = 3
--------------------- Subtract
3m = -3
m = -1
etc
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