解方程组:5x+6y=15,2x-3y+4z=37,3X-2Y-Z=15

解方程组：x+y+z=4,x+y+2z=5,3x+y-z=6 解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6} 解方程组﹛x+2y+3Z=15 3x-6y-z=5 2x-4y+3z=18 解三元一次方程组：x+y+z=6,y-z=4,x-y-2z=3, 解方程组{x:y:z=1:2:3 {2x+y-3z=15 解方程组{6x=4y=3z,2x+y+z=22 解二元一次方程组：x+y+z=15 2x+3y+4z=15 3x+4y+5z=62 解方程组2x+3y-z=9,x+y+z=15 ,5x-4y-z=o 解方程组{z=x+y 3x-2y-2z=-5 2x+y-z=3 解方程组 z=x+y 2x-3y+2z=5 x+2y-z=3 解方程组x-4y+z=-3,2x+y-z=18,x-y-z=7. x+y/2=z+x/3+y=z/4,...x+y+z=27.解方程组.