已知方程组x-2y+z=0,5x+2y-3z=0,求3x-y+2z分之4x+2y-3z的值
已知x,y,z满足方程组:4x-5y+2z=o;x+4y-3x=0,求x:y:z的值
已知x、y、z满足方程组:x+y-z=6;y+z-x=2;z+x-y=0 求x、y、z的值
已知方程组{2X-Y+3Z=0,X-3Y+Z=0(XYZ≠0),求3Y分之4X+2Z的值
已知x::y:z=3:4:5,(1)求x+y分之z的值;(2)若x+y+z=6,求x,y,z.
已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z
已知x+4y+3z=3x-2y-5z=0,求x+2y-z/2x-3y+7z的值
已知{3x+4y+5z=0,2x+3y-4z=0,求x+y+z/x-y+z的值.
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+z的值.
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/x-y+z的值.
已知x+y-3z=0.x-y-z=0,求3x+2y-z分之x+y+z的值.
已知x.y.z满足方程组x+2y-4z=0 2x+y-5z=0 求x:y:z的值
已知2x=3y=4z求2x-y+z分之x+y+z的值