4x+2y+z=5 4x-2y+z=1 z=-1
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759112331!
我的答案是x=1,y=1
相关问题
4x+2y+z=5,4x-2y+z=1,z=-1
解方程组[ 5x+y+z=1 ,2x-y+2z=1,x +5y-z=-4
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-
3x+2y+z=9 x-3y-2z=1 -x+4y+4z=5
解三元一次方程:{4x+2y+z=5,4x-2y+z=1,z=-1
{x+2y+z=4,x+y+2z=-1,2x+y+z=1
x+y+z=-1 4x-2y+3z=5 y-z=8-2x
x+y+z=2 4x+2y+z=4 2x+3y+z=1
2x-y=7 x+y+z=25x+3y+z=2 x-2y+z=-1 3x-4z=4 x+2y+3z=-1x+y-z=6x