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$\textit{a) x + 72 = 36}$

⇔ $\textit{x = 36 - 72}$

⇔ $\textit{x = -36}$

$\textit{Vậy: x = -36}$

$\textit{b) 16x² = 64}$

⇔ $\textit{x² = $\frac{64}{16}$ }$

⇔ $\textit{x² = 4}$

⇔ $\textit{x = √4 = 2}$

$\textit{Vậy: x = 2}$

$\textit{c) (5.x - 2) - 64 = -36}$

⇔ $\textit{5x - 2 - 64 = -36}$

⇔ $\textit{5x = -36 + 2 + 64}$

⇔ $\textit{5x = 30}$

⇔ $\textit{x= $\frac{30}{5}$ }$

⇔ $\textit{x = 6}$

$\textit{Vậy: x = 6}$

$\textit{d) (2x - 10).(5 - x) = 0}$

⇔ \(\left[ \begin{array}{l}2x - 10 = 0\\5-x=0\end{array} \right.\)

⇔ \(\left[ \begin{array}{l}2x = 10\\-x=-5\end{array} \right.\)

⇔ \(\left[ \begin{array}{l}x=\frac{10}{2} = 5\\x=5\end{array} \right.\)

$\textit{Vậy: x = 5}$