解方程组{2x+6y+3z=6 ① 3x+15y+7z=6 ② 4x-9y-4z=9 ③

3x-y+z=3,2x+3y-z=12,x+y+z=6解方程组 解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6} 解方程组2x+3y-z=12,3x-y+z=4,x+y+z=6 解方程组x+y+z=6 x+2y-3z=4 2x-y+z=5 解方程组：x+y+z=4,x+y+2z=5,3x+y-z=6 x+y+z+2,4x+2y+z+2,9x+3y+z=6解方程组 解方程组2x=3y=6z,x+2y+z=16 解方程组{6x=4y=3z,2x+y+z=22 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 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=6 〈1〉{x-3y+2z=1解方程组 x+y-z=6 〈1〉{x-3y+2z=1 3x+y-z=4 方程组3x+y+z=4,2x+3y-z=12,x+y+z=6解这个方程组要过程 解方程组,｛x+y+3=-6,2x-y+3z=-9.3x+2y-z=-4 解方程组x-y+z=0,3y-z=8,x+y=6 x+y-z=6 ① x-3y+2z=1② 3x+2y-z=3③ 求方程组解. 解方程组：2x+3y+z=3①,7x+6y+z=4②,x+y+z=7/3③. 解方程组:{x+y-2z=-3① {2x+6y+z=2② {x+y+z=0③ 解三元一次方程组：x+y+z=6,y:z=2:3,3x-z=0