若|3x-9|+|1/2y+1|=0,则1/3X-1/2y=z+5/6,字母z=?
已知x::y:z=3:4:5,(1)求x+y分之z的值;(2)若x+y+z=6,求x,y,z.
若x-2y+4z=1,x+3y-7z=0,则y:z=?
{x+y+z=1;x+3y+7z=-1;z+5y+8z=-2
解方程组2x+y-3z=1,x-2y+z=6,3x-y+2z=9求x,y,z的值
解方程一;{x+y-z=6,x-3y+2z=1,3x+2y-z=-7.②{3x+4z=7,2x+3y+z=9,5x-9y
若有理数x,y,z满足(x-1)的2016次方+|2x-y|+lx-3z|=0,求3x-5y-9z的值
2x-2y+z=0 2x+y-z=1 x+3y-2z=1
{2x-2y+z=0,2x+y-z+1,x+3y-2z=1
3x+2y+z=14 ,x+y+z=10,z+2x+3y=1 5
x+y+z=2 x-3y+2z=1 2x+2y+z+5 要具体步骤..
3道高数题,1,函数F(x,y,z)=(e^x) * y * (z^2) ,其中z=z(x,y)是由x+y+z+xyz=
x-y-z=-1 3x+5y+7z=11 4x-y+2z=-1 分别求出x=?y=?z=?