例如:2X+Y=10 4Y+Z=21 X,Y,Z各为多少?5X-Z=10

例如:2X+Y=10 4Y+Z=21 X,Y,Z各为多少?5X-Z=10 (4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=? (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian 2x+z=10 x+y-z=4 3x-y-z=0 x-y-2z=10 y-3z=-4 3x-y+5Z=21 三元一次方求大神x-y-2z=10y-3z=-43x-y+5Z=21 {2x+y=10 {x-y+z=4 {3x-y-z=0 (4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊 三元一次方程组例如x+4y=6 5y+2z=50 4x+z=12 怎样解三元一次方程组?例如：3x+7y+z=16.30 4x+10y+z=21.8 x+y/2=z+x/3=y+z/4 x+y+z=27 x+2y=3x+2z=4y+z 求x:y:z 若x,y,z成等差数列,则(z-x)^2-4(x-y)(y-z)= (x*x+2)(y*y+4)(z*z+8)=64xyz,求x,y,z X-Y-Z=0 X+Y-3Z=4 2X-5Y+7Z=21 x+2y+3z=10,x-y+4z=10,x+3y+2z=2 x+2y+3z=10,x-y+4z=10,x+3y+2z=2 4x+y+z=-3 2x+3y-4z=-10 x+2y-z=-1 x-y+4z=10,x+3y+2z=2,x+2y+3z=11.