Question

b. /2-3x/-5=-1

Answer 1

b, /2-3x/ - 5 = -1

=> /2-3x/ = 4

=> 2-3x =4

2-3x = -4

=> 3x = -2

3x = 6

=> x = -2/3

x = 2

Answer 2

Nguyễn Quang Ngọc Trác làm sai rồi

Đúng phải là:

/2-3x/-5=-1

\(\Rightarrow\) /2-3x/=4

\(\Rightarrow\left\{{}\begin{matrix}2-3x=4\\2-3x=-4\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}3x=-2\\3x=6\Rightarrow\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=\dfrac{-2}{3}\\x=2\end{matrix}\right.\)

Vậy x \(\in\left\{\dfrac{-2}{3};2\right\}\)