{-2y+3y=-6 3y+2z=0 4x-3z=5
1个回答
2x-3y=6
3y+2z=0
相加
x+z=3
x=3-z
4x-3z=5
12-4z-3z=5
z=1
x=2
y=-2/3
相关问题
2x+y+3z=5 3x-2y-z=6 4x-3y+2z=4
X+y-z=6;x-3y+2z=0;3x+2y-z=4
x-5y-3z=0 y+z-3x=3 x+y+3z=14 y+4z=3 z+x-3y=5 2x+y+z=7 2x-z=1
{5x-3y+6z=4 3x-y+2z=0 3x+z=-1
已知4x-3y-6z=0,x+2y-7z=0,且x,y,z≠0,求2x+3y+6z/x+5y+5z的值.
x+2z=3 x+y+z=2 2x+y=2 3x-y-4z=5 2y+z=7 2x+3y-2z=0
已知4x-3y-6z=0,x+2y-7z=0,求5x+2y-z/2x-3y-10z
x+y+z=2 ① 2x+3y+z=38 ① x+y=3 3x-y-4z=5 ② 3x+4y+2z+56 ② y+z=5
{x+y+z=0 4x+2y+z=3 9x+3y+z=6
3x-5y-6z=4,2x-2y-3z=5 2x-3y-4z=4 解方程,