diff --git a/book/modules/appendix1.tex b/book/modules/appendix1.tex
index 84363d1..9b17810 100644
--- a/book/modules/appendix1.tex
+++ b/book/modules/appendix1.tex
@@ -13,10 +13,13 @@
 	Additional relationships give rise to additional equations, which we express concisely as a
 	\emph{system of equations}, that is, a list of equations. For example, suppose you know the cake
 	had six pieces and your brother ate twice as many pieces as you. We might now write the system
-	\[
-		\sysdelim..
-		\systeme{C=M+B,B=2M,C=6}
-	\]
+ 
+	\begin{align*}
+  		C &= M + B \\
+  		B &= 2M \\
+  		C &= 6
+	\end{align*}
+ 
 	which should be interpreted as: ``the relationship $C=M+B$ holds \emph{and} the relationship $B=2M$ holds \emph{and}
 	the relationship $C=6$ holds.''
 	All this information, taken together, is enough to deduce the unknowns: $M=2$, $B=4$, and $C=6$.