Question

\(\left|x-23.4\right|=23.4\)

Answer 1

Lời giải:

$|x-23.4|=23.4$

$\Rightarrow x-23.4=23.4$ hoặc $x-23.4=-23.4$

$\Rightarrow x=23.4+23.4$ hoặc $x=23.4-23.4$

$\Rightarrow x=184$ hoặc $x=0$

Answer 2

\(\left|x-23.4\right|=23.4\\ \\ \\\Rightarrow\left|x-92\right|=92\\ \\ \\ \Rightarrow\left[{}\begin{matrix}x-92=92\\-x+92=92\end{matrix}\right. \Rightarrow\left[{}\begin{matrix}x=92+92=19=184\\-x=92-92=0\Rightarrow x=0\end{matrix}\right.\)

Vậy x=184; x=0