x+y-2z=0 11x+4y-8z=7 27x+104y-54z=77

问题描述:

x+y-2z=0 11x+4y-8z=7 27x+104y-54z=77
要过程

X=2z-y
11(2z-y)+4y-8z=7
22z-11y+4y-8z=7
14z-7y=7
7y=14z-7
Y=2z-1
Z=(x+y)/2=(y+1)/2
X+y=y+1
X=1