解方程：x+y+z=0 ① 4x+2y+z=3 ② 9x+3y+z=6 ③

解方程 x+y+z=0 4x+2y+z=3 9x-3y+z=28解方程x+y+z=04x+2y+z=39x-3y+z=28 {x+y+z=4 {2y+z=0 {3x+2y-4z=-1解方程 解方程x+y+z+1=0,2x-y+3z+4=0, 解方程：x+y+z=0 ① 4x+2y+z=3 ② 9x+3y+z=6 ③ x+y/2=z+x/3+y=z/4,...x+y+z=27.解方程组.X+Y/2=Z+X/3=Y+Z/4,X+Y+Z=27.解方程 解方程：{2x+3y+z=7,x+y+z=4,3x+y-z=-4{2x+3y+z=7,x+y+z=4,3x+y-z=-4要过程 解方程：4x+4y+4z-12=x^2+y^2+z^2 解方程：｛ x/2=y/3=z/4 x+y+z=27 {x+y-2z=5① {2x-y+z=4② {2x+y-3z=10③ 解一元三次方程 要过程 解方程｛x+y+z=4 ①,2x+y+3z=9 ②,x+3y+2z=14 ③ 解方程x+y+z=2,3x-y-4z=5 ,2x+3y-2z=0用代入法! X+Y+Z=0 4X+2Y+1=-3Z X+4Y=9X+Y+Z=04X+2Y+1=-3ZX+4Y=9这个方程怎么解? 解下列方程：x-4y=0,x+2y+5z=22,x+y+z=12 解方程 Y=X+Z Y-Z=2 100Z+10Y+X-(100X+10Y+Z)=99 Y=X+ZY-Z=2100Z+10Y+X-(100X+10Y+Z)=99 解方程 x(x+y+z)=6 y(x+y+z)=12 z(x+y+z)=18 解方程x-y+4z=5,y-z+4x=-1,z-x-4y=4 解方程:{x+y-3z=8,y+z-3x=4,z+x-3y=-12 解方程:{x+y-3z=-8,z+y-3x=-4,z+x-3y=12