Question

giúp mik câu c, d, e vớiiiiiiiiiiiiiiiiiiii

Answer 1

c) |-x+7|=24

⇒\(\left[{}\begin{matrix}-x+7=24\\-x+7=-24\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=-17\\x=31\end{matrix}\right.\)

d) |x+8|+15=0

|x+8|=0-15

|x+8|=-15

⇒x=∅

e) |x|+|x-3|=0

\(\Rightarrow\left[{}\begin{matrix}x=0\\x-3=0\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=0\\x=3\end{matrix}\right.\)

Answer 2

c: Ta có: \(\left|-x+7\right|=24\)

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