Question

[25. Lê Hoàng Yến Nhi]

3x=1/5

3x trong giá trị tuyệt đối

Answer 1

[Tô Mì]

\(\left|3x\right|=\dfrac{1}{5}\Rightarrow3x=\left\{{}\begin{matrix}\dfrac{1}{5}\\-\dfrac{1}{5}\end{matrix}\right.\)

\(\Rightarrow\begin{matrix}3x=\dfrac{1}{5}\Rightarrow x=\dfrac{1}{15}\\3x=-\dfrac{1}{5}\Rightarrow x=-\dfrac{1}{15}\end{matrix}\)

Vậy: \(x\in\left\{\dfrac{1}{15};-\dfrac{1}{15}\right\}\)

Answer 2

[Châu Chu]

->|3x-5|=\(\dfrac{1}{5}\)

•TH1:                                         •TH2

3x=-\(\dfrac{1}{5}\)                                       3x=\(\dfrac{1}{5}\)

x=.......                                    x=....(tự tính:)))))