Fix cw.tex

cw/cw.tex

@@ -129,19 +129,19 @@
 
 	B:
 	$$w = (30548, 6642)$$
-	$$\systeme{
-		30548=137t_1 + 215t_2,
-		6642=312t_1 + -187t_2
-	}= \systeme{
-		t_1 = \frac{7140506}{92699},
-		t_2 = \frac{8621022}{92699}
-	}=\systeme{
+	$$\begin{cases}
+		30548=137t_1 + 215t_2\\
+		6642=312t_1 + -187t_2\\
+	\end{cases}= \begin{cases}
+		t_1 = \frac{7140506}{92699}\\
+		t_2 = \frac{8621022}{92699}\\
+	\end{cases}=\begin{cases}
 		t_1 \approx 77.03,
 		t_2 \approx 93
-	}=\systeme{
+	\end{cases}=\begin{cases}
 		t_1 \approx 77,
 		t_2 \approx 93
-	}
+	\end{cases}
 	$$