# Align equal signs of equations in array

I have an array of equations which looks like this:

\documentclass{article}

\begin{document}

$$\begin{array}{cc} x=1 & y=1 \\ x=10 & y=20 \end{array}$$

\end{document}


I'd like to align the equals sign vertically. I tried doing this, which I felt should work:

\documentclass{article}
\usepackage{amsmath}

\begin{document}

\begin{array}{cc} \begin{align} x&=1 \\ x&=10 \end{align} & \begin{align} y&=1 \\ y&=10 \end{align} \\ \end{array}

\end{document}


However, that did not work at all and threw me a million errors. Does anyone have any suggestions for me?

\documentclass{article}
\usepackage{amsmath}
\begin{document}

align
\begin{align*}
x&=1 & y&=1 \\
x&=10 & y&=20
\end{align*}

alignat
\begin{alignat*}{2}

array is intended for arrays of values, not for aligned expressions. (The terms are set in inline math mode, and the spacing is all wrong). Also  is not LaTeX syntax.
You can use align (or for more control over the space between the two equations, alignat)