方程组x-y-z=5 y-x-z=1 z-x-y=-15的解是?

方程组x-y-z=5 y-x-z=1 z-x-y=-15的解是? 解方程组x+y-z=-5,x-y-z=1,x-y+z=15 方程组x+y-z=11 y+z-x=5 z+x-y=1的解 怎样解三元一次方程组(1)x+y-z=11,y+z-x-5,z+x-y=1 x+y+z=77 y+5=z 4x=z三元一次方程组 方程组y+z-x= -5 x+z-y= -1 x+y-z=15的解是?x=?y=?z=? 三元一次方程组{5x+y+z=1 2x-y+2z=1 x+5y-z=4 求X Y Z的值 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 已知 x/(y+z)+y/(z+x)+z/(x+y)=1求 (x*x)/(y+z)+(y*y)/(x+z)+(z*z)/(x+y)=? 解方程组{x(x+y+z)=6,y(x+y+z)=12,z(x+y+z)=18 解方程组：{x(x+y+z)=6 {y(x+y+z)=9 {z(x+y+z)=10 x+y=-2 x+z=13 y+z=1 解方程组x+y=-2x+z=13y+z=1解方程组 方程组 ｛5x+8y+12z=100 x+y+z=14 方程组｛5x+8y+12z=100x+y+z=14 三元一次方程组x+y+z=1解三元一次方程组x+y+z=1x-y+z=3x+y-z=-1 解三元一次方程组1、x+y-z=4 2x-y+z=5 x-3y+z=-2 2、y+2z=-2 3x+y-4z=1 2x-y+2z=8 3、x-2y+z=-1 x+y+z=2x+2y+3z=-1 三元一次方程组解法 4x+y-z=12 x+y+z=26 3x+2y+z=-5 x-y=1 x-y+5z=1 2x-y+z=18 急 急、、、、、、、、、、 解方程组；1.x+y+z=26,x-y=1,2x-y+z=18 2.5x+y+z=1,2x-y+2z=1,x+5y-z=4. matlab解对数方程组[x,y,z]=solve('0.29744*x/(3+0.1*x+y+z)=(log10((3+x+y+z)/(3+0.1*x+y+z)))^2','0.79*x/(3+0.1*y+z)=(log10((3+x+y+z)/(3+0.1*x+y+z)*(3+y+z)/(3+0.1*y+z)))^2','1.25*x/(3+0.1*z)=(log10((3+x+y+z)/(3+0.1*x+y+z)*(3+y+z)/(3+0.*1y+z)*(3+z)/