LaTeX Forum

\documentclass[12pt,
			   headsepline, 
			   liststotoc,
			   bibtotocnumbered,
			   paper=a4,
			   numbers=noendperiod,
			   ]{scrreprt}
			   
\usepackage[ngerman]{babel}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[babel, german=quotes]{csquotes}
\usepackage[expansion=true, protrusion=true]{microtype}


\usepackage{setspace}
\onehalfspacing
\KOMAoptions{DIV=last}


\usepackage{amsmath}
\usepackage[all, error]{onlyamsmath}


\usepackage{pdfpages}
\usepackage{listings}

\begin{document}
\chapter{bla}
\begin{subequations}
\label{eqn:Gleichung}
\begin{align}
a = b + c\label{eqn:1}\\
x = y + z\label{eqn:2}
\end{align}
\end{subequations}

\end{document}

\documentclass{scrreprt} 

\usepackage{amsmath} 
\usepackage[nameinlink,ngerman]{cleveref} 

\begin{document} 

\chapter{bla} 
\begin{subequations} 
\label{eqn:Gleichung} 
\begin{align} 
 a = b + c\label{eqn:1}\\ 
 x = y + z\label{eqn:2}\\
 x = y + z\label{eqn:3}
\end{align} 
\end{subequations} 

\cref{eqn:1}

\cref{eqn:1,eqn:2} 

\cref{eqn:1,eqn:2,eqn:3} 

\end{document}