4x-2y+z=7,2x-y-3z=28,x+y-2z=13要过程
三元方程求救要过程2x+3y+z=383x+4y+2z=564x+5y+z=66x:y=5:3x:z=7:32x-y-z
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
x+y-z=6 x-3y+2z=0 3x+2y-z=0 求x、y、z 要过程
2x+3y-4z=0.,3x+4y+5z=0,则x+y+z/x-y+z详细的解题过程
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
x/2=y/3=z/5 x+3y-z/x-3y+z
x+2y+4z=17 2x+y+z=7 3x+y+2z=11
解方程:{2x+3y+z=7,x+y+z=4,3x+y-z=-4
2x+5y+4z=6,3x+y-7z=-4,x+y-z=?
2x+5y+4z=0,3x+y-7z=0,则x+y-z=?
已知2x+5y+4z=6 3x+y-7z=-4求x+y-z
2X+Y+Z=10,X+2Y+Z=-6,X+Y+2Z=8 5X+4Y-3Y=13,2X-3Y+7Z=19,3X-Y=2X