求x,y,D= 1 2 1 = -82 -1 11 -1 2D1= 0 2 1 = 41 -1 13 -1 2D2= 1 0 1 = 42 1 11 3 2D3= 1 2 0 =-122 -1 11 -1 3所以x=D1/D=-1/2y=D2/D=-1/2z=D3/D=3/2如果是求x,y,z的话就是这样求了,其实直接算不是更简单么....en是的课本书上应该有例题的呀，照着把数字给改了就行了~