Trả lời đúng , mình sẽ cho 5 vote

\(\Rightarrow x-\left(-x+x+3\right)-\left(x+3-x+2\right)=0\\ \Rightarrow x-3-5=0\\ \Rightarrow x=8\)

Sai rồi bạn ơi, bằng -2 mới đúng,bn thử lại coi

`x-(5/6 -x) =x-2/3`

`x-5/6 +x -x+2/3 =0`

`x = 5/6-2/3 = 5/6 -4/6 = 1/6`

bạn có thể giải chi tiết hơn dc ko TV Cuber

 x³ - x² - x = 1/3 
<=> x³ = x² + x + 1/3 
<=> 3x³ = 3(x² + x + 1/3) 
<=> 3x³ = 3x² + 3x + 1 
<=> 3x³ + x³ = x³ + 3x² + 3x + 1 
<=> 4x³ = (x + 1)³ 
<=> ³√(4x³) = ³√(x + 1)³ 
<=> ³√4.x = x + 1 
<=> ³√4.x - x = 1 
<=> x(³√4 - 1) = 1 
<=> x = 1/(³√4 - 1) 

Ta có \(\frac{x-1}{x+2}=\frac{x-2}{x+3}\)

\(\Rightarrow\left(x-1\right)\left(x+3\right)=\left(x+2\right)\left(x-2\right)\)

\(\Rightarrow x^2+2x-3=x^2-4\)

\(\Rightarrow x^2-x^2+2x=-4+3\)

\(\Rightarrow2x=-1\)

\(\Rightarrow x=-\frac{1}{2}\)

Vậy \(x=-\frac{1}{2}\)

=>20x+190=950

=>20x=760

hay x=38

`20x+190=950`

`20x=760`

`x= 760: 20`

`x= 38`

20 x X = 950 - (1 + 2 + 3 + 4 + 5 + ... + 19)

20 x X = 950 - 190

20 x X = 760

X = 760 : 20

X = 38

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

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

\(\left(x+1\right)\left(x^2+1\right)-y^3=0\)

\(\orbr{\begin{cases}x+1=0\\x^2+1=0\end{cases}}\Rightarrow\orbr{\begin{cases}x=-1\\x^2=-1\end{cases}\Rightarrow\orbr{\begin{cases}x=-1\\kothoaman\end{cases}}}\)

\(\Rightarrow\hept{\begin{cases}x=-1\\y^3=0\end{cases}}\Rightarrow\hept{\begin{cases}x=-1\\y=0\end{cases}}\)

Vậy x = -1, y =0

\(x^3+x^2=36\)

\(\left(x^3\right)^2\)=36

\(x^6\)=\(6^6\)

Vậy x=6

5/3

5/3

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

\(x=\dfrac{2}{3}\times\dfrac{5}{2}\)

\(x=\dfrac{5}{3}\)

\(x=\left(\dfrac{1}{2}:\dfrac{2}{3}\right)+\dfrac{3}{5}=\dfrac{1}{3}+\dfrac{3}{5}=\dfrac{5}{15}+\dfrac{9}{15}=\dfrac{14}{15}\)