解方程:x+y+z=86,15x:12y=3:2,12y:9z=2:1
3x-y+z=3 2x+y-3z=11 x+y+z=12 解方程
解方程{3x -y+z=4 2x+3y-z=12 x+y+z=6
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:y=2x x+y+z=12 3x+2y+z=24
解方程组1、4x+9y=12,3y-2z=1,2x+6z=32、3x-y+2z=3,2x+y-3z=11,x+y+z=1
x:y:z=1:2:3 x+2y+3z=56解方程
x+2y+3z=28 x:y:z=1:2:3 解方程
解方程:{2x+3y+z=7,x+y+z=4,3x+y-z=-4
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
如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y,
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
解三元一次方程组 {2x+y+3z=1 y-2z=4 3x+y=9 {2x+y+z=9 y-2z=-12 3x+y=7