Qua O kẻ Ot // MN // PQ
\(\Rightarrow\begin{cases}\widehat{N}+\widehat{tON}=180^0\\\widehat{P}=\widehat{tOP}=133^0\end{cases}\)
\(\Rightarrow\begin{cases}\widehat{tON}=58^0\\\widehat{tON}+x=133^0\end{cases}\)
\(\Rightarrow55^0+x=133^0\)
\(\Rightarrow x=75^0\)