4x-3y+z=0 x+3y-11z=0
兩式相加,
5x-10z=0
x=2z
x:z=2
x=2z代入4x-3y+z=0
8z-3y+z=0
9z-3y=0
y=3z
x:y:z=2z:3z:z=2:3:1
x+3y-z/2x-3y+4z
=(2z+9z-z)/(4z-9z+4z)
=10z/(-z)
=-10
已知4x-3y+z=0 x+3y-11z=0,求:(1)x::z的值;(2)x:y:2的值;(3)x+3y-z/2x-3y+4z的值
已知4x-3y+z=0 x+3y-11z=0,求:(1)x::z的值;(2)x:y:2的值;(3)x+3y-z/2x-3y+4z的值
數(shù)學(xué)人氣：691 ℃時間：2020-04-03 15:21:57
優(yōu)質(zhì)解答
我來回答
類似推薦
- 已知2X-3Y+4Z=2,4X+3Y+2Z=4,則X+Z=?
- 已知:x-3y+z=0,3x-3y-4z=0,求(4x-12y+z分之2x+6y-11z)的平方
- 若x:4=y:5=z:6,則4x分之2x-3y+4z的值為?
- 4x+y+z=-3 2x+3y-4z=-10 x+2y-z=-1
- x:y:z=3:4:5,2x-3y+4z=28,求4X+3Y-2Z的值
- 函數(shù)f(x)=sinx-cosx^2的最小值是?
- 英語翻譯
- I took my grandpa to the hospital this morning,_____ I missed the first class.
- So crazy
- 方差是各個數(shù)據(jù)與平均數(shù)之差的平方的平均數(shù)
- 函數(shù)y=f(x)與它反函數(shù)y=f^-1(x)怎么讀?
- These are photos of my families.Look at them 改錯
猜你喜歡
- 1平面與平面重合,是否屬于平行一類?那重合的兩直線,也屬于平行一類的嗎?
- 2非洲每年因饑餓死亡的人數(shù)及現(xiàn)在饑餓人口數(shù)量拜托各位了 3Q
- 3decide to do sth.還=什么
- 4(7/8)o you think of london?B:5.____london is one of the liveliest cities
- 5啤酒可以托運嗎
- 6邊長為2√6的等邊三角形的中心到一邊的距離為?
- 7please give your hand to help me
- 8已知2的X次方等于3的Y次方等于6的Z次方不等等于1,證明X分之一加Y分之一等于Z分之一.
- 9幫我做做?
- 10機械分析天平TG628A的使用說明書
- 11in winter ,we wear warm coats to protect our bodies_.
- 12( )was most importance to her ,she told me,was her family it this what as