![使用 displaystyle 时删除 itemize 中的跳行](https://linux22.com/image/480529/%E4%BD%BF%E7%94%A8%20displaystyle%20%E6%97%B6%E5%88%A0%E9%99%A4%20itemize%20%E4%B8%AD%E7%9A%84%E8%B7%B3%E8%A1%8C.png)
答案1
请勿align*
使用$\begin{aligned}[t]
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{enumerate}
\item
$\begin{aligned}[t]
x^3 &=x^2 + 1\\
x^3 - x^2 - 1&= 0
\end{aligned}$
\item
\hspace*{\fill}%
$\begin{aligned}[t]
x^3 &=x^2 + 1\\
x^3 - x^2 - 1&= 0
\end{aligned}$%
\hspace*{\fill}
\end{enumerate}
\end{document}