diff --git a/notes/.obsidian/plugins/obsidian-activity-history/data.json b/notes/.obsidian/plugins/obsidian-activity-history/data.json
index f228ac4..15a1cc8 100644
--- a/notes/.obsidian/plugins/obsidian-activity-history/data.json
+++ b/notes/.obsidian/plugins/obsidian-activity-history/data.json
@@ -13,7 +13,7 @@
     {
       "path": "/",
       "date": "2022-04-08",
-      "size": 823937
+      "size": 824062
     }
   ],
   "activityHistory": [
@@ -566,7 +566,7 @@
         },
         {
           "date": "2022-04-08",
-          "value": 477
+          "value": 602
         }
       ]
     }
diff --git a/notes/mat/Rovnice/Soustavy rovnic.md b/notes/mat/Rovnice/Soustavy rovnic.md
index 5a0e2d9..fdc46c8 100644
--- a/notes/mat/Rovnice/Soustavy rovnic.md	
+++ b/notes/mat/Rovnice/Soustavy rovnic.md	
@@ -234,3 +234,8 @@ $z=3.6$
 $K=\{[1.8, 0, 3.6]\}$
 
 ---
+
+$3x+5y+z=9$
+$-1x+1y+z=0$
+$5x+11y+z=27$
+