作业帮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.
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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.
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.
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.
由第三式 99z-99x=99 z-x=1 z=x+1 代入第二式 2x+1=y+1 y=2x 将z=x+1 与 y=2x 代入第一式
有100x+10*2x+(x+1)=27(x+2x+x+1) 即可解出x 然后将x的值代入z=x+1 与 y=2x之中 即可得y与z
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)(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
解三元一次方程组,100x+10y+z=27(x+y+z) {x+y-z=1 (100z+10y+x)-(100x+10y+z）=99
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)
x+y/2=z+x/3=y+z/4 x+y+z=27
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)=?
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
x+y+z=27 2x+y+3z=53 2x+y+10z=123
紧急..x+y+z=20x+2y+1.5z=367x+10y+6z=100