x+y+z=11 100z+10y+x-100x+10y+z=693 100x+10z+y-100x+10y+z=54解方程组

(x+y-z)(x-y+z)= 解方程 Y=X+Z Y-Z=2 100Z+10Y+X-(100X+10Y+Z)=99 Y=X+ZY-Z=2100Z+10Y+X-(100X+10Y+Z)=99 100x+10y+z=27(x+y+z) x+z=y+1 100z+10y+x-100x-10y-z=99 解方程组100x+10y+z=27(x+y+z) x+z=y+1 100z+10y+x-100x-10y-z=99 .急. x+y+z=11 100z+10y+x-100x+10y+z=693 100x+10z+y-100x+10y+z=54解方程组 解方程：x+y+z=11 100x+10y+z=100z+10y+x+693 100z+10x+y=100z+10y+x+54 解方程组：{x(x+y+z)=6 {y(x+y+z)=9 {z(x+y+z)=10 X+Y+Z=? x/y=(x+z)/(y+z)y/z=(x+y)/(x+z) 已知 x/(y+z)+y/(z+x)+z/(x+y)=1求 (x*x)/(y+z)+(y*y)/(x+z)+(z*z)/(x+y)=? {x+y-z=11 y+z-x=5 z+x-y=1 {x+y-z=11,x-y-z=-5,x-y+z=1 14x+4y+z=200,x+y+z=100求解x,y,z x+y=8 y+z=12 x+z=10 x+y+z= x+y=8 y+z=12 x+z=10 x+y+z= x+y+z=15 x+5y+10z=70 x,y,z,各是几? x+y+z=15 x+5y+10z=70 x,y,z,各是几? X+Y-Z=15 X+5Y+10Z=70 求：X、Y、Z (y+z)/x=(z+x)/y=(x+y)/z求x+y-z/x+y+z的值