x+y+z=32,y=25/4,x-y=z,要求要有过程
(x+y-z)(x-y+z)=
解三元一次方程 (要有过程) x-y-z=-1 3x+5y+7z=11 4x-y+2z=-1
X+Y+Z=?
三元方程求救要过程2x+3y+z=383x+4y+2z=564x+5y+z=66x:y=5:3x:z=7:32x-y-z
2x+3y-4z=0.,3x+4y+5z=0,则x+y+z/x-y+z详细的解题过程
f(x,y,z,w)=x*(x+y)*(x+y+z)*(x+y+z+w)
解三元一次方程组:(要有过程){x+y-z=0,x+2y+z=13,2x-3y+2z=5
急!用加减消元法做!要有详细过程! x+3y+z=-1,2x-y+3z=7,3x+y+2z=3
解三元一次方程: 3x+2y+z=13 x+y+2z=7 2x+3y-z=12 要求过程!(急急急)
x y z x+y--- = --- = ---- ----y+Z z+x x+y ,求 z 的值 .求 x+y----
已知x+y-z/z=x-y+z/y=-x+y+z/x,且xyz不等于0,求分式[(x+y)(x+z)(y+z)]/xyz
若z分之x+y+z=y分之x-y+z=x分之-x+y+z,求xyz分之(x+y)(y+z)(z+x)