化简:-5x^5y^3z除以(1/5x^4y)乘上25x^2y
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除以x-y+z,
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
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X除以3等于Y除以4等于Z除以5,求X加Y除以X减2Y加3Z
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
1.(x+y-z)+(x-y+z)-(x-y-z) 2.2x-(3x-2y+3)-(5y-2)
已知x+2y-3z=0,2x+3y+5z=0,求(x+y+z)除以(x-y+z)
已知x+2y-3x=0,2x+3y+5z=o.求x+y+z除以x-y+z
已知3x=4Y,5Y=6Z,求 (1)x:y:z;(2)x+y/y+z.
因式分解:25x y^2 z^2 (x+y-z)-30xyz(z-x-y)^2+5x y z^3 (z-x-y)
{5x-3y+z=2{5x+2y-4z=3{-5x+y-z=2 {x-y-z=-1{3x+5y+7z{4x-y+2x=-