解方程组 ①x+y-z=0②x-3y+2z=1 ③3x+2y-z=4 求x,y,z的值用加减代入法,

解方程组x+y/2=z+x/3=y+z/4①x+y+z=27② 方程组{①x:y:z=1:2:3 ②x+y+z=36 这个方程组怎么解 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=0 ① x+4y+2z=3 ② x+9y-3z=28 ③ 解方程组｛X+Y+Z=0①,4X+2Y+Z=5②,4X-2Y+Z=-3③ 解方程组{2x+3y+z=11,x+y+z=0,3x-y+z=-2. 解方程组x+y-z=0,2x+y+z=7,x-3y+z=8 解方程组x:y=3:2①y:z=5:4②x-y-z=66③ 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 已知x,y,z均不为0,且满足方程组{x+y-z=0,①2x-y-5z=0.②试求(2x+y+3z)/(3x-y-z)值. 已知x,y,z均不为0,且满足方程组x+y-z=0,①2x-y-5y=0.②试求2x+y+3z/3x-y-z值. 解方程组 (x+y) / 2 = (2y-x )/ 3 =2 ① x-3y+z=10② 解方程组 ①x+y-z=0②x-3y+2z=1 ③3x+2y-z=4 求x,y,z的值用加减代入法, 解三元一次方程组{2x+y=10,x-y+z=4,3x-y-z=0 解方程组x-y+z=0,3y-z=8,x+y=6 方程组2x+3y-z=9 x+y+z=15 5方程组2x+3y-z=9 x+y+z=15 5x-4y-z=0的解, 解方程组{2X-Y+Z=-3①,X+3Y-2Z=13②,3X-2Y-Z=2③ 解方程组｛2X-Y+Z=-3①,X+3Y-2Z=13②,3X-2Y-Z=2③