4X=6Y=9Z 则X:Y:Z=4X=6Y=9Z 则X:Y:Z=

4X=6Y=9Z 则X:Y:Z=4X=6Y=9Z 则X:Y:Z= 三元一次方程x+y+z=0 4x+2y+z=3 9x+3y+z=6x+y+z=04x+2y+z=3 9x+3y+z=6 解方程组：{x(x+y+z)=6 {y(x+y+z)=9 {z(x+y+z)=10 x+y+z=4x-5y=y-x+6z,xyz不等0,x:y:z=? 12y+9z=x,6(y+1/4)+9z=x,y+z=x {x+y+z=0 {4x+2y+z=3 {9x+2y+z=6 {x+y+z=0 4x+2y+z=3 9x+3y+z=6 初二数学x+2y+4z=6,2x+y-z=9,求x+y+z=? x+y+z+2,4x+2y+z+2,9x+3y+z=6解方程组 若x:y:z=3：4：6,则x-y+z分之x+y-z的值为? 若x,y,z成等差数列,则(z-x)^2-4(x-y)(y-z)= 三元一次方程组,1.x-2y+z=9 2x+y+3z=10 3x+2y1.x-2y+z=92x+y+3z=103x+2y-z2.3x-5y+2z=14x+5y-z=5X-5y+3z=-23.7x+2y-z=76x-y+z=74x+3y+z=94.4x+3y-2z=-75x-6y+z=12x+z=-25.2x+3y-4z=-23x-2y+5z=262x+5z=31 若4x-3y-6z=0,x+2y-7z=0,则x+y+z/3x-y+z=? 已知4x-3y-6z=0,x+2y-7z=0,则x-y+z/x+y+z=_________ 已知4x-3y+6z=0 x+2y-7z=0 则x-y+z/x+y-z=? 已知{4x-3y-6z=0、x+2y-7z=0,则x-y+z：x+y+z= 已知方程组4x-y+3z=0 2x+y+6z=0且xyz不等于0,则x/y+y/z+z/x是多少 已知x/4=y/5=z/6则（x+y)(y+z)=