Grazynazolich
Rozwiązane

rozwiąż
{ 3x-y=6
-3x+2y=12

{x+2y=12
-x+3y=3

{-2x+3y=5 /*3
3x-4y=1-5 /*2
daje naj ​​



Odpowiedź :

{3x - y = 6

+ {-3x + 2y = 12

----------------------

y = 18

3x - 18 = 6

3x = 24 / : 3

x = 8

{x + 2y = 12

+ {-x + 3y = 3

--------------------

5y = 15 / : 5

y = 3

x + 2 * 3 = 12

x = 12 - 6

x = 6

{-2x + 3y = 5 / * 3

{3x - 4y = 1 - 5 / * 2

{-6x + 9y = 15

+ {6x - 8y = -8

---------------------

y = 7

6x - 8 * 7 = -8

6x - 56 = -8

6x = 48 / : 6

x = 8

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