方程组{x+y=9,y+z=14,x+z=13

解方程组：{x(x+y+z)=6 {y(x+y+z)=9 {z(x+y+z)=10 解三元一次方程组{x+y=-14,y+z=-7,z+x=9 方程组{x+y=9,y+z=14,x+z=13 解方程组+x+y=14++y+z=-7++x+z=9 方程组 ｛5x+8y+12z=100 x+y+z=14 方程组｛5x+8y+12z=100x+y+z=14 解方程组{x(x+y+z)=6,y(x+y+z)=12,z(x+y+z)=18 解三元一次方程组x+z=y,7z=x+y+2,x+y+z=14 方程组 2x+y+z=7,x+2y+z=8,x+y+2z=9 快 解下列方程组{x+y-z=9;y+z-x=13;z+x-y=11}要过程 解方程组 x+y+z=5 2x-y-z=4 3x-2y-z=9 方程组3x-y-z=9,2x+y-2z=6,x+y+z=15 方程组3x+y+2z=10,2x+3y-z=9,x+y+z=6 x+y+z+2,4x+2y+z+2,9x+3y+z=6解方程组 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 方程组：{x+y-z=6,x+z=16,x-y+2z=17 解三元一次方程组 x+y=12 x+y+z=10 z-y-z=14 急 解x(x+y+z)=4-yz、y(x+y+z)=9-xz、z(x+y+z)=25-xy方程组 解方程组{x+y=14,y+z=21,x+z=11.