{-3/2m+n=4 {2m+n=-3 求m,n 注意,
1个回答
-3/2m+n=4 (1)
2m+n=-3 (2)
(2)-(1)
2m+3/2m=-3-4
7/2m=-7
所以
m=-2
n=-3-2m=1
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