ok:

(2x+2⁴).5³=4.5⁵

(2x+2⁴)=4.5⁵:5³

(2x+2⁴)=4.5²

(2x+2⁴)=100

  2x=100-16

  2x=84

    x=84:2

    x=42

2x+24).53=4.55 (2x+24)=4.55:53 (2x+24)=4.52 (2x+24)=100 2x=100-16 2x=84 x=84:2 x=42

(2x - 1/3)= 2

2x= 2+1/3

2x= 7/3

x= 7/3 : 2

x= 1,66666

a: =>2x-1/3=2

=>2x=7/3

=>x=7/6

b: Sửa đề: 1/11-5/22

\(\dfrac{8}{9}:\left(\dfrac{1}{11}-\dfrac{5}{22}\right)+\dfrac{5}{9}:\left(\dfrac{1}{15}-\dfrac{2}{3}\right)\)

\(=\dfrac{8}{9}:\dfrac{-3}{22}+\dfrac{5}{9}:\dfrac{-9}{15}\)

\(=\dfrac{8}{9}\cdot\dfrac{-22}{3}+\dfrac{5}{9}\cdot\dfrac{-5}{3}\)

\(=\dfrac{-66-25}{27}=\dfrac{-91}{27}\)

 3/4-2x| 1|=7/8

7.5-3|5-2x|=-4.5

|x +4/15|+ 1/2=3.5       

Ai giúp mình với, Mình đang cần gấp

(Ai làm nhanh mình k nha)

`2x-15=-25`

`2x=-10`

`x=-5`

___________

`3/5<x/10<4/5`

`3/5=(3xx10)/(5xx10)=30/50`

`x/10=(5x)/(10xx5)=(5x)/50`

`4/5=(4xx10)/(5xx10)=40/50`

`=>30/50<(5x)/50<40/50`

`=>30<5x<40`

`=>x=7`

(2x-5)³-12 = 15

(2x-5)³       = 27

(2x-5)³         = 9³

=> TH1: 2x-5 = 9

              2x    = 14

                x     = 7

      TH2: 2x-5 = -9

               2x    = -4

                 x    = -2

(2x-5)^3 = 15+12 = 27= 3^3

=> 2x-5 = 3

2x = 3+ 5= 8

x = 8: 2

( 2x - 5 )³ - 12 = 15

=> ( 2x - 5 )³ = 27

=> ( 2x - 5 )³ = 3³

=> 2x - 5 = 3

=> 2x = 8

=> x = 4

a)

 \(\left(2x-15\right)^5=\left(2x-15\right)^3\\ \Leftrightarrow\left(2x-15\right)^5-\left(2x-15\right)^3=0\\ \Leftrightarrow\left(2x-15\right)^3.\left[\left(2x-15\right)^2-1\right]=0\\ \Leftrightarrow\left[{}\begin{matrix}2x-15=0\\\left(2x-15\right)^2-1=0\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}2x-15=0\\\left(2x-15-1\right).\left(2d-15+1\right)=0\end{matrix}\right.\\\Leftrightarrow\left[{}\begin{matrix}2x-15=0\\2x-16=0\\2x-14=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{15}{2}\\x=8\\x=7\end{matrix}\right. \)

b) \(\left(7x-11\right)^3=\left(-3\right)^2.15+208\\ \Leftrightarrow\left(7x-11\right)^3=343=7^3\\ \Leftrightarrow7x-11=7\\ \Leftrightarrow x=\dfrac{18}{7}\)