X+Y+Z=100,0.1X+3Y+4Z=100

(x+y-z)(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) x=y/z=z/3,x+y+z ＝12,求2x+3y+4z是多少, X+Y+Z=? 方程组｛4x-3y-3z=0,x-3y+z=0,(x.y.z不等于0),求x/z和y/z的值? 4x-3y-3z=0 x-3y+z=0 并且X Y Z不等于0 求x:z 和y:z的值 matlab 画 2*x^2+y^2+6*z^3-9*x*y+16*x*z-4*y*z=100的三维图像 解三元一次方程组X+Y+Z=100 6X+4Y+Z=200 已知3X=4X,5Y=6Z求X+Y：Y+Z x/2=y/3=z/5 x+3y-z/x-3y+z 若{x+3y+10z=0 则 (x+y-z)/(x-y+z) 100x+10y+z=48(x+Y+Z) x+Z=y+3 100x+10y+z-(100z+10y+x)=198 怎么解