方程组x+y+z=9,x^3+y^3+z^3=99,xyz=24,有( )组解.A.2B.4C.6D.8
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方程组3x+y+2z=10,2x+3y-z=9,x+y+z=6
解方程组 x+y+z=5 2x-y-z=4 3x-2y-z=9
方程组3x-y-z=9,2x+y-2z=6,x+y+z=15
x+y+z+2,4x+2y+z+2,9x+3y+z=6解方程组
解方程组x-2y=-9 y-z=3 2z+x=47
解方程组3x+y+z=6,x+3y+z=5,x+y+3z=9{3x+y+z=6{x+3y+z=5{x+y+3z=9
方程组2x+3y-z=9 x+y+z=15 5方程组2x+3y-z=9 x+y+z=15 5x-4y-z=0的解,
方程组x+3y-z=17 2x-y+z=16中的y、z同时满足y=z+2,求x、y、z.急!
方程组{4x-3y-3z=0,x-3y+z=0,(x.y.z不等于0),求x/z和y/z的值?
三元一次方程组x+y+z=1解三元一次方程组x+y+z=1x-y+z=3x+y-z=-1
4x-9z=17 3x+y+15z=18 x+2y+3z=24x-9z=17 3x+y+15z=18 x+2y+3z=2方程组
解方程组:{x(x+y+z)=6 {y(x+y+z)=9 {z(x+y+z)=10
解方程组x-y+z=0,3y-z=8,x+y=6
解下列三元一次方程组:(1)x-z=4,x+y-z=-1,2y-z=1 (2)3x+4z=7,2x+3y+z=9,x-y+z=8
解方程组 :X+Y-3Z=1 Y+Z-3X=2 Z+X-3Y=3
解方程组x-y-3z=4 3x+y-z=6 -x+3y+z=8
解方程组x-y-3z=4 3x+y-z=6 -x+3y+z=8
3x-y+z=3,2x+3y-z=12,x+y+z=6解方程组