方程组x+y+z=14,12x+8y+5z=100,

方程组 ｛5x+8y+12z=100 x+y+z=14 方程组｛5x+8y+12z=100x+y+z=14 方程组x+y+z=14,12x+8y+5z=100, 方程组 (1)x+3y-z=2 (2)5x+y=8 (3)x+y+z=12 解方程组：一,x-y=3 3x-8y=14 二,x+y=5/6 y+z=7/12 z+x=3解方程组：一,x-y=3 3x-8y=14 二,x+y=5/6 y+z=7/12 z+x=3/4 解方程组{x(x+y+z)=6,y(x+y+z)=12,z(x+y+z)=18 已知方程组2x-y+z=5 5x+8y-z=9 三元一次方程组,1.x-2y+z=9 2x+y+3z=10 3x+2y1.x-2y+z=92x+y+3z=103x+2y-z2.3x-5y+2z=14x+5y-z=5X-5y+3z=-23.7x+2y-z=76x-y+z=74x+3y+z=94.4x+3y-2z=-75x-6y+z=12x+z=-25.2x+3y-4z=-23x-2y+5z=262x+5z=31 解方程组:5x=8z.5y解方程组:5x=8z.5y=2z.x+2y+3z=2. 解三元一次方程组 x+y=12 x+y+z=10 z-y-z=14 急 已知关于x y z的方程组2x-3y+5z=7 x+2y-3z=8,则4x+y-z= 解方程组 x+y+z=-7 x-y=12 x+y-z=6 解方程组 5x+6y-8z=12 x+4y-z=-1 2x+3y-4z=5 解三元一次方程组x+y-3z=12,4x-y+z=10,x+5y-z=8急 解一道三元一次方程组 x+2y+3z=12,4x-5y+6z=64,7x+8y-9z=-72 请高手帮我解几道3元1次的方程组!好的100分,x+2y+3z=15x-y+7z=20x+3y+2z=14x+y-z=3y+z-x=5z+x-y=7x+y-z=0.5x-3y+2z=03x+2y-z=23x-2y=12y+3z=2x+5z=315x-3y+2z=13x+4y-z=-18z=136x-y-z=32x-4y+8z=53x-6y-z=10x+y=3y+z=5x+z=6 方程组 (1) x+2y-3z=12 x-3y+2z= - 13 x-y-z=0 (2) x+ y=z 5x-y+z=18 2x+5y+3z= -1 x+y=12 x+y+z=10 x-y-z=14 ←解这个方程组, 解方程组{x-4y=0 x+2y+5z=22 x+y+z=12