(7X^2Y^3-8X^3Y^2Z)除以8X^2Y^2
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
{(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y
2X+Y+Z=10,X+2Y+Z=-6,X+Y+2Z=8 5X+4Y-3Y=13,2X-3Y+7Z=19,3X-Y=2X
解三元一次方程:x+y-z=0,2x+y+z=7,x-3y+z=8
已知x除以2=y除以3=z除以4,且x≠0,求x+y+z除以x-2y+3z的值,
{x+y+z=1;x+3y+7z=-1;z+5y+8z=-2
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
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2x+3y-4z=0,3x+4y-5z=0.求x+y+z除以x-y+z,
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+z的值.
已知x+2y-3x=0,2x+3y+5z=o.求x+y+z除以x-y+z