Question

a)\(\left|-x-7\right|=24\)

Answer 1

\(\left|-x-7\right|=24\\ \Leftrightarrow\left[{}\begin{matrix}-x-7=24\\-x-7=-24\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=-31\\x=17\end{matrix}\right.\)

Vậy ...

Answer 2

|-x-7|=24

-x-7=24

-x-7=-24

X =17

X=-31

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