如何将“align*”中的第一行与“item”计数器对齐

Question

\documentclass[12pt,a4paper]{article}
\usepackage{amsmath}
\usepackage[more]{tasks}
\NewTasks[
counter-format={tsk[1])},%%1,a,A,r,R
label-format=\bfseries,
label-width=1.5em,
label-align=left,    %% or right as you wish
label-offset=0.5em,
item-indent=2em,
after-item-skip=0pt,
after-skip=-0.5\baselineskip,
before-skip=0.5\baselineskip,
resume=false         %% comment this for not to resume
]{problems}[\item](4)%% (4)here makes all of them in 4columns


\begin{document}

\begin{problems}(4)
\item
    \begin{align*}
        3x+y &= 7 \\
        2x+y &= 6
    \end{align*}
\item $
    \begin{cases}
        3x+y &= 7 \\
        2x+y &= 6
    \end{cases}
    $
\item $
    \begin{matrix}
        3x+y &= 7 \\
        2x+y &= 6
    \end{matrix}
    $
\end{problems}
\end{document}

我该如何改变这一点，使得 $3x+y=7$ 与 1) 垂直对齐？

也就是说，我想要解除联立方程的第一行。

感谢。

Answer 1

\item
    $ \begin{aligned}[t]
        2x+y &= 21 \\
         x-y &= 6
    \end{aligned} $
\item
    $ \begin{aligned}[t]
        5x+y &= 28 \\
         x-y &= 2
    \end{aligned} $

解决了！

就那么简单！