From d4f62d83371a58731bfff01b1b988c9d9b71c565 Mon Sep 17 00:00:00 2001
From: Daniel Bulant <danbulant@gmail.com>
Date: Wed, 20 Apr 2022 09:40:41 +0200
Subject: [PATCH] vault backup: 2022-04-20 09:40:41

---
 .../obsidian-activity-history/data.json       |  4 +-
 notes/mat/Rovnice/Soustavy rovnic.md          | 46 +++++++++++++++++++
 2 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/notes/.obsidian/plugins/obsidian-activity-history/data.json b/notes/.obsidian/plugins/obsidian-activity-history/data.json
index ef30033..bd76cb2 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": "2022-04-20",
-      "size": 825284
+      "size": 825808
     }
   ],
   "activityHistory": [
@@ -586,7 +586,7 @@
         },
         {
           "date": "2022-04-20",
-          "value": 986
+          "value": 1510
         }
       ]
     }
diff --git a/notes/mat/Rovnice/Soustavy rovnic.md b/notes/mat/Rovnice/Soustavy rovnic.md
index fdc46c8..24f768b 100644
--- a/notes/mat/Rovnice/Soustavy rovnic.md	
+++ b/notes/mat/Rovnice/Soustavy rovnic.md	
@@ -239,3 +239,49 @@ $3x+5y+z=9$
 $-1x+1y+z=0$
 $5x+11y+z=27$
 
+---
+
+$4x-3y+2z=9$
+$3x+2y-2z=2$
+$-7x-16y+14z=6$
+
+$4x-3y+2z=9$
+$3x+2y-2z=2$
+$7x-y=11$
+
+$-28x+21y-14z=-63$
+$-7x-16y+14z=6$
+$-35x+5y=-57$
+
+$-35x+5y=-55$
+$-35x+5y=-57$
+
+---
+
+$4x-3y+2z=9$
+$6x+4y-4z=4$
+$-7x-16y+14z=8$
+
+$8x-6y+4z=18$
+$6x+4y-4z=4$
+$14x-2y=22$
+
+$-28x+21y-14z=-63$
+$-7z-16y+14z=8$
+$-35x+5y=-55$
+
+$70x-25y=110$
+$-70x+25y=-110$
+
+
+---
+
+Na dvorku pobíhají zvířátka: králící a kuřata
+Pepík je pozoroval a napočítal celkem 30 hlaviček a 88 nožiček. Kolik je králíčků a kolik kuřátek?
+
+$x*4+(30-x)*2=88$
+$x*4+30*2-x*2=88$
+$4x-2x=28$
+$2x=28$
+$x=14$ - králíčci
+$(30-x)=16$ - kuřátka