(8x-3y)-(4x+3y-z)+2z过程- - 2-(1+x+x²-x²)
已知x/2=y/3=z/4,求下列各式 (1)(x+y+z)/x (2)(x-y+2x/(x-y-2z)
若3x-2y-z=0,x+4y-3z=0,求3x²+y²/4x²-y²+z
(1)3x+4z=7;2x+3y+z=9;5x-9y+7z=8 (2)3x+4y+z=14;x+5y+2z=17;2x+
2x+3y-4z=0.,3x+4y+5z=0,则x+y+z/x-y+z详细的解题过程
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.
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
解三元一次方程 (要有过程) x-y-z=-1 3x+5y+7z=11 4x-y+2z=-1
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
初一 下 数学 1、已知3x-4y-z=0,2x+y-8z=0,求 x²+y²-z²÷xy
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
1.(x+y-z)+(x-y+z)-(x-y-z) 2.2x-(3x-2y+3)-(5y-2)
已知|x-8y|+2(4y-1)²+3|8z-3x|=0,求x、y、z的值?