3x-2y=8① 2y+3z=1②x+5y-z=-4③解

已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX.. 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 (4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=? {x+y+z=1;x+3y+7z=-1;z+5y+8z=-2 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 {x+y+z=1 x-2y+3z=5 2x-3y-3z=-8 2y+z=3y ① ,x+3y-z=8,② x+y+2z=13③ 求x,y,z x+y+z=-1 4x-2y+3z=5 y-z=8-2x {x+y+z=1 {x+3y+7z=-1 {x+5y+8z=2 (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian 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 (4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊 x/2=y/3=z/5 x+3y-z/x-3y+z x+y+z=1 x+3y+7z=-1 x+5y+8=2题错了 x+y+z=1 x+3y+7z=-1 x+5y+8z=2 解三元一次方程组1、x+y-z=4 2x-y+z=5 x-3y+z=-2 2、y+2z=-2 3x+y-4z=1 2x-y+2z=8 3、x-2y+z=-1 x+y+z=2x+2y+3z=-1 ①3x-4y+z=14x+5y+2z=172x+2y-z=3② x:y=3:2y:z=5:4x+y+z=66 解三元一次方程组 1.x-y-5z=1① 2.x-y=8① x+y+z=5② x+y+z=3② 2x-3y+z=14③ 2x-y+z=14③1.x-y-5z=1① 2.x-y=8①x+y+z=5② x+y+z=3② 2x-3y+z=14③ x-y+z=14③