解方程组:{x+y-2z=-3① {2x+6y+z=2② {x+y+z=0③
解方程组:{x+y-2z=-3① {2x+6y+z=2② {x+y+z=0③
已知x、y、z满足方程组:x+y-z=6;y+z-x=2;z+x-y=0 求x、y、z的值
解方程组{2x+3y+z=11,x+y+z=0,3x-y+z=-2.
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
解方程组:2x+3y+z=3①,7x+6y+z=4②,x+y+z=7/3③.
解方程组x+y+z=3 ① 3X+2Y+Z=2 ① 2x+3y+2z=7 ② X+3Y+2Z=1 ② x-y=0 ③ 2
解三元一次方程组:x+y-z=0 ① 3x+y=6 ① 2x-y+3z=2 ② x+2y-z=5 ② x-4y-2z+6
已知x,y,z满足方程组{x+y-z=6{y+z-x=2{z+x_y=0,求x,y,z的值
解方程组2x+y-3z=1,x-2y+z=6,3x-y+2z=9求x,y,z的值
已知方程组4x-y+3z=0 2x+y+6z=0且xyz不等于0,则x/y+y/z+z/x是多少
4x-3y-6z=0,x+2y-7z=0是一个方程组,那么x-y+z/x+y+z的值等于