Q=12x=15y=3x+15z怎么解
解方程组x-y=12,y-z=-15,z-x=3
min Q=x+y+z x+y+z>=687 x+y+z>=983 x+y+z>=674 x+y+z>=918 x+y+
matlab解方程怎么出错了[x,y,z]=('x^2-5*y^2+7*z^2+12=0 ','3*x*y+x*z-11
x+2y=3 x+y+z=36 2x+y+z=15 2y=3z x-y=1 x+2y+z x-z=-1 2x+z-y=1
解方程组{x(x+y+z)=6,y(x+y+z)=12,z(x+y+z)=18
解方程组{x:y:z=1:2:3 {2x+y-3z=15
x+y+z=6 3x-y+2z=12 x-y-3z=-4这个三元一次方程组怎么解!
已知20(x+2y)=15(y+3Z)=12(z+5x),则x:y
解方程组x+y-z=-5,x-y-z=1,x-y+z=15
方程组x-y-z=5 y-x-z=1 z-x-y=-15的解是?
解方程组:2x+y+z=15 x+2y+z=16 x+y+z=17
20(x+y)=12(y+z)=15(z+x),且xyz不等于零,求x:y:z=