①X+Y-Z=2 ②4Z-2Y+3Z+8=0 ③X+3Y-3Z-6=0三元一次方程求XYZ应是①X+Y-Z=2 ②4X-2Y+3Z+8=0 ③X+3Y-3Z-6=0

2y+z=3y ① ,x+3y-z=8,② x+y+2z=13③ 求x,y,z 解方程组x+y/2=z+x/3=y+z/4①x+y+z=27② 解三元一次方程组 ①2x-y+z=1 3x+y -2z=2 X+2y-z=3 ②x-4y+z=-3 2x+Y-Z=18 X-Y-Z=7 ③4x+4y+2z=7 6X-4y-z=6 2x-y+z=1 ①x+y+z=6 3x-y+2z=12 x-y-3z=-4 ②x+y-z=2 4x-2y+3y+8=0 x+3y-2z-6=0③x/3=y/2 y/4=z/5 x+y+z=60三元一次方程 x+2y=3x+2z=4y+z 求x:y:z (x*x+2)(y*y+4)(z*z+8)=64xyz,求x,y,z x+y/2=z+x/3=y+z/4 x+y+z=27 (4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=? (4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊 X/10=Y/8=Z/9,则X+Y+Z/2Y-3Z ①3x-4y+z=14x+5y+2z=172x+2y-z=3② x:y=3:2y:z=5:4x+y+z=66 x=y/z=z/3,x+y+z ＝12,求2x+3y+4z是多少, 已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX.. ①5x-4y+4z=132x+7y-3z=193x+2y-z=18②y=2x-75x+3y+2z=23x-4z=4 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) 已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z 已知x/2=y/4=z/7,求①x：y：z.②若2x+y+3z=58,分别求x,y,z的值.③求x+y/x+z的值. 2x+z=10 x+y-z=4 3x-y-z=0