方程组①x/2=y/3=z/4②x+2y+3z=80

解方程组x+y/2=z+x/3=y+z/4①x+y+z=27② 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 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+Z=0①,4X+2Y+Z=5②,4X-2Y+Z=-3③ 解方程组：2x+3y+z=3①,7x+6y+z=4②,x+y+z=7/3③. 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①x+y+z=根号下（x+y+z+1)+5②x/2=y/3=z/4 方程组①x/2=y/3=z/4②x+2y+3z=80 解方程组：2x+y+z=-4 x+2y+z=-2 x+y+2z=3 解方程组 x+y+z=5 2x-y-z=4 3x-2y-z=9 解方程组x+y+z=6 x+2y-3z=4 2x-y+z=5 求适合方程组 3x+2y-z=4 2x-y+2z=6 x+y+z 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 已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z 解方程组x-4y+z=-3,2x+y-z=18,x-y-z=7. 解方程组：x+y+z=4,x+y+2z=5,3x+y-z=6