diff --git a/notes/.obsidian/plugins/obsidian-activity-history/data.json b/notes/.obsidian/plugins/obsidian-activity-history/data.json
index cb4fdb9..f228ac4 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": 823783
+      "size": 823937
     }
   ],
   "activityHistory": [
@@ -566,7 +566,7 @@
         },
         {
           "date": "2022-04-08",
-          "value": 323
+          "value": 477
         }
       ]
     }
diff --git a/notes/mat/Rovnice/Soustavy rovnic.md b/notes/mat/Rovnice/Soustavy rovnic.md
index 193fdaa..5a0e2d9 100644
--- a/notes/mat/Rovnice/Soustavy rovnic.md	
+++ b/notes/mat/Rovnice/Soustavy rovnic.md	
@@ -202,9 +202,35 @@ $9-10+z=9$
 $-10+z=0$
 $z=10$
 
+$K=\{[3,-2,10]\}$
+
 ---
 
 $3x+5y+z=9$
 $-2x+2y+z=0$
 $5x-19y+5z=27$
 
+$3x+5y+z=9$
+$2x-2y-z=0$
+$5x+3y=9$
+
+$-15x-25y-5z=-45$
+$5x-19y+5z=27$
+$-10x-44y=-18$
+
+$10x+6y=18$
+$-10x-44y=-18$
+$-38y=0$
+$y=0$
+
+$10x=18$
+$x=1.8$
+
+$3x+5y+z=9$
+$3*1.8+5*0+z=9$
+$5.4+z=9$
+$z=3.6$
+
+$K=\{[1.8, 0, 3.6]\}$
+
+---