You can solve the problem with a single variable x representing the lower left box. The upper left box equals 8-x and the lower right box equals x-5. Then the upper right box can be expressed as both 21/(8-x) and 9/(x-5). Equating these two values yields x = 5.9, with the other three boxes equal to 2.1, 0.9 and 10.
Quand on donne un problème, il faut préciser dans quel ensemble on travaille. D'autant plus que tous les chiffres de l'énoncé sont des entiers naturels. Merci.
English : It is simply a system of 4 equations with 4 unknowns. There are several methods to solve such a system. The simplest is the elimination method. And perhaps the simplest solution would be to use a spreadsheet calculator. There, you only enter the constants and the solution is in a few seconds. Czech : Je to prostě soustava 4 rovnic o čtyřech neznámých. Metod jak takovou soustavu řešit je několik. Nejjednodušší je vylučovací metoda. A snad úplně nejjednodušeji by to šlo řešit pomocí tabulkového kalkulátoru. Tam se pouze zadají konstanty a řešení je v několika vteřinách.
why do you make it hard ? is it an easy way ? 7 x 3 = 21 then 1- 6 = 5 then from left up to down 7 +1 = 8 then from right up to down 3 +6 = 9 . be smart .
You can solve the problem with a single variable x representing the lower left box. The upper left box equals 8-x and the lower right box equals x-5. Then the upper right box can be expressed as both 21/(8-x) and 9/(x-5). Equating these two values yields x = 5.9, with the other three boxes equal to 2.1, 0.9 and 10.
Brilhante !
7×3=21 and 8-3=5
Quand on donne un problème, il faut préciser dans quel ensemble on travaille.
D'autant plus que tous les chiffres de l'énoncé sont des entiers naturels.
Merci.
A×B=21, C-D=5, A+C=8, B×D=9
(A+C)-(C-D)=8-5
A+C-C+D=3
A+D=3
A=21/B, D=9/B
30/B=3
3B=30
B=10, A=2.1, D=0.9, C=5.9
English :
It is simply a system of 4 equations with 4 unknowns.
There are several methods to solve such a system. The simplest is the elimination method.
And perhaps the simplest solution would be to use a spreadsheet calculator. There, you only enter the constants and the solution is in a few seconds.
Czech :
Je to prostě soustava 4 rovnic o čtyřech neznámých.
Metod jak takovou soustavu řešit je několik. Nejjednodušší je vylučovací metoda.
A snad úplně nejjednodušeji by to šlo řešit pomocí tabulkového kalkulátoru. Tam se pouze zadají konstanty a řešení je v několika vteřinách.
How do you derive to calculating (iii)-(ii)? Why not e.g. (i)+(iv)?
I got😂
A=-2.1
B=-10
C=5.9
D=-0.9
Incredible!
7×3=21
+ ×
1-3=5❌️=2
^ ^
8 9
Было бы решение в целых...
А так банальная система 4 линейных уравнений 4 переменнных.
"d" must be negative. I used d as negative and it worked, but different result and worked.
Excellent.
Thanks so much.
2,1 х10=21, 3х7=21 !!! 8-2,1=5,9. 10/9=0.9
що, не побачили в кінці помилку?
B=10
A=21/10
C=59/10
D=9/10
teacher! The number “9” written by the teacher only looks like a lowercase “g”!
Nice presentation. But you need to be more specific: integer, rational...
Karışık olan beynim iyice karıştı
Muchas gracias por compartir tan interesante video 😊😊. Realmente un sistema de ecuaciones con 4 incógnitas muy bien desarrollado y explicado.❤😊❤
21 = 1*21, 3*7, 7*3, 21*1
9 = 1*9, 3*3, 9*1
But no one equal x + y = 8 or x - z = 5
So the roots ≠ Z 😅😅😅
Nothing said it had to be integers.
@@jamesharmon4994 yes, But I proof that the root(s) aren't intenger 😊😊😊
@@andryvokubadra2644 oh, ok. I knew that before watching the video. LOL
very easy.
a ↓ 8-a → 3-a ↑ 9/(3-a)
a → 21/a
21/a=9/(3-a), 7(3-a)=3a, 21=10a, a=2.1
(2.1 10)
(5.9 0.9)
Phentanild + piyot = para que prenda
+a×b-c=43
4+8-6+4=10
-d+e×f=15
1×4×8=32
a-8×d=-18
b+e=14
c+f=2
uzun yolu seçip çözmek nedir yahu
Thanks for reminding us
But algebra and fragmentation are for the scholar Muhammad Musa Khwarazmi
empty works..
So fun
great
Very simple every body
3×3=9
9
why do you make it hard ? is it an easy way ? 7 x 3 = 21 then 1- 6 = 5 then from left up to down 7 +1 = 8 then from right up to down 3 +6 = 9 . be smart .
Retarded bot, glad that AI invasion will be far in the future..
1-6=-5 not 5 this is wrong