Question

tìm x, bt:

/x-1,7/ = 2,3

Answer 1

\(\left|x-1,7\right|=2,3\)

\(\Rightarrow\left[{}\begin{matrix}x-1,7=2,3\\x-1,7=-2,3\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=4\\x=-0,6\end{matrix}\right.\)

Vậy \(x=4\) hoặc x = -0,6

Answer 2

\(\left|x-1.7\right|=2.3\)

\(\Leftrightarrow\left[{}\begin{matrix}x-1.7=2.3\\x-1.7=-2.3\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=4\\x=-0.6\end{matrix}\right.\)