Tìm x, biết:a) \(x + 7 = –23 + 5\)b) \({2^{x + 1}}...

Câu hỏi: Tìm x, biết:a) \(x + 7 = –23 + 5\)b) \({2^{x + 1}} - 8 = 8\)                               c) \((4x - 16):{3^2} = 4\) 

A \(\begin{array}{l}a)\,\,x =  - 25\\b)\,\,x = 3\\c)\,\,x = 13\end{array}\)

B \(\begin{array}{l}a)\,\,x =  - 11\\b)\,\,x = 5\\c)\,\,x = 13\end{array}\)

C \(\begin{array}{l}a)\,\,x =  - 25\\b)\,\,x = 3\\c)\,\,x = 14\end{array}\)

D \(\begin{array}{l}a)\,\,x =  - 11\\b)\,\,x = 5\\c)\,\,x = 14\end{array}\)