K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

8 tháng 10 2016

a)\(\left(2x+1\right)^3=125\)

\(\left(2x+1\right)^3=5^3\)

\(\Rightarrow2x+1=5\)

\(2x=5-1\)

\(2x=4\)

\(\Rightarrow x=2\)

Vậy x=2

b) \(\left(4x-1\right)^2=25\cdot9\)

\(\left(4x-1\right)^2=225\)

\(\left(4x-1\right)^2=15^2\)

\(\Rightarrow4x-1=15\)

\(4x=16\)

\(x=4\)

Vậy x=4

8 tháng 10 2016

x =2

hoặc 4

nhe sbn

đúng ko vậy

bn hihi

a)Câu a sai đề

b)x=4

k mik nha

Học tốt

viết lại đề câu a nha

5 tháng 7 2017

2

22222222222222222222222222222222222222222222222222222222222
222v2222222222222222222222222222222222222222222222222222222222                                               
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                         
9 tháng 10 2017

lkl;k

28 tháng 10 2021
Jdjsjsnnsndndndndndnnejejekekeodkndnfndndnnfnfnfnfnndkakwowoeijrhfbd historical đó có bột all of có lúc có là do sốc xó óc đó Úc được xây ff xóc đi h Hà đó ơi clan. Gì ơi có óc cm mà đi mà số of con là clair đó Úc áo
7 tháng 1 2019

+) Ta có: 9 = 1 . 9 = 9.1 = 3.3

Lập bảng :

4x +1193
y - 3913
x021/2
y1249

Vì x thuộc n nên ...

+) Ta có : 25 = 1.25 = 25.1 = 5.5

Lập bảng:

2x + 31255
y + 4251 5
  x -1111
y 21-31

vì x thuộc N nên...

17x + 3. ( -16x – 37) = 2x + 43 - 4x

<=>17x-48x-111=-2x+43

<=>-29x=154

<=> \(x=-\frac{154}{29}\)

-3. (2x + 5) -16 < -4. (3 – 2x)

\(\Leftrightarrow-6x-31< -12+8x.\)

\(\Leftrightarrow-14x< 19\Rightarrow x< -\frac{19}{14}\)

6 tháng 12 2021

\(\text{a) -3000 : 2 + 5(2x-1) = 125}\\ -1500+5\left(2x-1\right)=125\\ 5\left(2x-1\right)=125-\left(-1500\right)\\ 5\left(2x-1\right)=1625\\ 2x-1=1625:5\\ 2x-1=325\\ 2x=325+1\\ 2x=326\\ x=326:2\\ x=163\)

6 tháng 12 2021

\(\text{b) 6x -12 = -18}\\ 6x=-16+12\\ 6x=-6\\ x=-1\)

1 tháng 10 2017


2x + 2x+3 = 144
\(\Rightarrow\)2x + 2. 8 = 144
\(\Rightarrow\)2x . ( 8 + 1 ) = 144
\(\Rightarrow\)2x . 9 = 144 
\(\Rightarrow\)2x = 16
\(\Rightarrow\)2x = 24
\(\Rightarrow\)x = 4
 ( 4x - 1 ) 2 = 25 . 9
\(\Rightarrow\)(4x - 1 )2 = 52 . 32
\(\Rightarrow\)(4x - 1 ) 2 = 152
\(\Rightarrow\)4x - 1 = 15
\(\Rightarrow\)4x = 16
\(\Rightarrow\)x = 4