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}