解方程组:x:y:z=4:7:8,x+y+2z=54
解方程组:x:y:z=4:7:8,x+y+2z=54
方程组X:Y:Z=4:7:8,X+Y+2Z=54 求XYZ
解方程组x:y:z=4:7:8 x+y+2z=54 x= y= z= 10:00之前给分
求方程组x:y:z=4:7:8,x+y+2z=54的解是x= y= z=
如何解方程组(x+2y)(x+2z)=-16,(y+2z)(y+2x)=8,(z+2x)(z+2y)=-7
解方程组:2x+3y+4z=20,x+y+z=7
解方程组 2x+y+z=7 x+2y+z=8 x+y+2x=9
3x-y+2z=8 2x+2y-4z=9 7x+y-5z=-4解方程组
解方程组3x+y+2z=8,x+y+z=5,2x+3y+4z=7
解方程组2x+y-z=7 x+y+z =1 2x-y-z=5
解方程组x-y-3z=4 3x+y-z=6 -x+3y+z=8
方程组 2x+y+z=7,x+2y+z=8,x+y+2z=9 快