\(x:\dfrac{1}{2}=\dfrac{3}{4}+\dfrac{5}{3}\\ \Rightarrow x:\dfrac{1}{2}=\dfrac{9}{12}+\dfrac{20}{12}\\ \Rightarrow x:\dfrac{1}{2}=\dfrac{29}{12}\\ \Rightarrow x=\dfrac{29}{12}\times\dfrac{1}{2}\\ \Rightarrow x=\dfrac{29}{24}\)

\(x\div\dfrac{1}{2}=\dfrac{3}{4}+\dfrac{5}{3}\)

\(x\div\dfrac{1}{2}=\dfrac{29}{12}\)

\(x=\dfrac{29}{12}\times\dfrac{1}{2}\)

\(x=\dfrac{29}{24}\)

x : 1/2 = 29/12

x = 29/12 x 1/2

x = 29/24

\(-\dfrac{1}{2}x+6< 0\Leftrightarrow-\dfrac{1}{2}x< -6\Leftrightarrow\cdot\dfrac{1}{2}x>6\Leftrightarrow x>12\)

(sai thì thoi nha)

\(-\dfrac{1}{2}x+6< 0\)

\(\Leftrightarrow-\dfrac{1}{2}x< -6\)

\(\Leftrightarrow x>\left(-6\right):\left(-\dfrac{1}{2}\right)\)

\(\Leftrightarrow x>12\)

--> Chọn A

35 : 8 = 4 ( dư 3 )

X = 8

Tham khảo nhé

x chia hết cho 6 suy ra x thuộc B(6)

x chia hết cho 15 suy ra x thuộc B(15)

x thuộc BC(6;15)

 ta có 

6=2.3

15=3.5

BCNN(6;15)=2.3.5=30

x thuộc B(30) mà 60<x<350

x thuộc (90;120;150;180;210;240;270;300;330)

\(2\sqrt{48}-3\sqrt{75}+5\sqrt{3}\)

\(=2\sqrt{16.3}-3\sqrt{25.3}+5\sqrt{3}\)

\(=2\sqrt{4^2.3}-3\sqrt{5^2.3}+5\sqrt{3}\)

\(=2.4\sqrt{3}-3.5\sqrt{3}+5\sqrt{3}\)

\(=8\sqrt{3}-15\sqrt{3}+5\sqrt{3}\)

\(=\left(8-15+5\right).\sqrt{3}\)

\(=-2\sqrt{3}\)

\(\dfrac{3}{x}=\dfrac{1}{y}=\dfrac{6}{2}\)

\(\Rightarrow\dfrac{3}{x}=\dfrac{1}{y}=3\)

\(\Rightarrow\left\{{}\begin{matrix}x=1\\y=\dfrac{1}{3}\end{matrix}\right.\)

x = 1

y = 1/3

x = 1 

y = 1/3. 

\(\left(x-1\right)^3=\left(x-1\right)^6\)

Vì 3 là số lẻ; 6 là số chẵn mà để \(\left(x-1\right)^3=\left(x-1\right)^6\)thì x-1=1

\(\Rightarrow x-1=1\)

\(\Rightarrow x=2\)

Vậy x=2

(x-1)³ = (x-1)⁶

=> (x-1)³ - (x-1)⁶ = 0

(x-1)³.[1 - (x-1)³ ] = 0

=> (x-1)³ = 0 => x - 1 = 0 => x = 1

1 - (x-1)³ = 0 => (x-1)³ = 1 => x - 1 = 1 => x  = 2

KL:...

sai đề ak bạn