3x-2y=8①,2x+3z=1②,x+5y-z=-4③.

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 2y+z=3y ① ,x+3y-z=8,② x+y+2z=13③ 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) 已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z 已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX.. 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 x+Y+Z=1 X+3Y+7Z=-1 X+5Y+8Z=2x+Y+Z=1X+3Y+7Z=-1X+5Y+8Z=2 解三元一次方程,①{x+y-z=0{ x+2y+z=13{2x-3y+2z=5②｛x+y-z=11｛y+z-x=5｛z+x-y=1③｛x+y=1｛y+z=6｛z+x=3 (4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=? 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 解方程组x+y/2=z+x/3=y+z/4①x+y+z=27② {x+y+z=1 x-2y+3z=5 2x-3y-3z=-8 {x+2y+z=8{2x-y-z=-3{3x+y-2z=-1 {x+2y+z=8,2x-y-z=-3,3x+y-2z=-1 x+y+z=-1 4x-2y+3z=5 y-z=8-2x 2x+3y+z=8 4x-y-z=10 x+2y-z=1 {x+y+z=1 {x+3y+7z=-1 {x+5y+8z=2