早教吧作业答案频道 -->数学-->
x+y=3y+z=-2z+x=9则x+y+z的值为?
题目详情
▼优质解答
答案和解析
(X+Y)+(Y+Z)+(Z+X)=3 +(-2)+9
2*(X+Y+Z)=10(X+Y+Z)=5
2*(X+Y+Z)=10(X+Y+Z)=5
看了x+y=3y+z=-2z+x=...的网友还看了以下:
问一道解方程组的题☆请写出球方程组的具体步骤用拉格朗日乘子法.令F(x,y,z,λ,μ)=x^2+ 2020-05-17 …
用z(x,y)=?表示(x^2+(9/4)y^2+z^2-1)^3-x^2z^3-(9/80)y^ 2020-05-21 …
1.3(x+y)-4(x-y)=4x+y/2+x-y/6=62.x+2y+3z=72x+y+z=7 2020-06-03 …
计算:(x-y)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(x+y-2z 2020-07-13 …
已知(y+z)/x=(z+y)/y=(x+y)/z,求分式(x+y-z)/(x+y+2z)的值不好意 2020-10-31 …
方程组{X+Y+Z=6{3X-Y+2Z=12{X-Y-3Z=-4{X+Y+Z=6{3X-Y+2Z=1 2020-10-31 …
一直(X—2Y)^2+|Y-3Z|=0求X=2Y+Z/X=Y-2Z的值已知(X—2Y)^2+|Y-3 2020-10-31 …
1、已知a,b,c,d,均为整数,且a^5=b^4,c^3=d^2,a-c=65,则b-d=多少?2 2020-11-01 …
1.已知1=xy/(x+y),2=yz/(y+z),3=zx/(z+x),则x+y+z=?2..当x 2020-11-01 …
计算下列各式:(1)1a−b+1a+b+2aa2+b2+4a3a4+b4;(2)x2+yzx2+(y 2020-11-07 …