因式分解(3X+4Y-5Z)(3X-4Y=5Z)
因式分解(3X+4Y-5Z)(3X-4Y=5Z)
因式分解:25x y^2 z^2 (x+y-z)-30xyz(z-x-y)^2+5x y z^3 (z-x-y)
已知3X=4X,5Y=6Z求X+Y:Y+Z
(x+2y-7z)^3+(3x-4y+6z)^3-(4x-2y-z)^3 因式分解
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
(X-Y)3+(Y-Z)3+(Z-X)3 因式分解
已知x:y:z=3:4:5,3x+2y-4z=18.求:x+y+z.
因式分解:(x+y+z)的平方-4(x-y-z)
2x+5y+4z=6,3x+y-7z=-4,x+y-z=?
{2x+3y-4z=-5 x+y+z=6 x-y+3z=10
若3x+7y+z=5,4x+10y+z=3,则x+y+z=?
已知2x+5y+4z=6 3x+y-7z=-4求x+y-z