杭州交通信息网骁龙801和435哪个好:数学题一道````快快解答
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解方程组
5x+4y+z=0
3x+y=4z+11
x+y+z=-2
5x+4y+z=0
3x+y=4z+11
x+y+z=-2
5x + 4y + z = 0 ..................(1)
3x + y - 4z = 11..................(2)
x + y + z = -2.......................(3)
(1) - (3)
4x + 3y = 2 .........................(4)
(1)*4 + (2)
23x + 17y = 11 ......................(5)
(4)*17 - (5)*3
68x - 69x = 34 - 33
x = -1
y = 2
z = -3
x=-116
y=183
z=-69
X=-1
Y=2
Z=-3