解{2x+4y+3z=1{3x-2y+5z=1{5x+6y+8z=2
{x+y+z=1;x+3y+7z=-1;z+5y+8z=-2
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.
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
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
x-y-z=-1 3x+5y+7z=11 4x-y+2z=-1 分别求出x=?y=?z=?
x/2=y/3=z/5 x+3y-z/x-3y+z
{5x-3y+z=2{5x+2y-4z=3{-5x+y-z=2 {x-y-z=-1{3x+5y+7z{4x-y+2x=-
解三元一次方程组:(1)x+2y+3z=11x-y+4z=10x+3y+2z=2(2)x:y=3:5y:z=5:6x+y
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-
已知3x=4Y,5Y=6Z,求 (1)x:y:z;(2)x+y/y+z.
已知3x=4Y,5Y=6Z,求 (1)x:y:z;(2)x+y/y+z
已知x:y:z=4:5:7,求:(1)2x+3y+z/5z; (2)x+y/y+z.