rozwiaz uklad metoda przeciwnych wspolczynnikow
7x - 3y = 4
5x + 4y = 9
7x - 3y = 4 | *(-5)
5x + 4y = 9 | *7
-35x + 15y = -20
35x + 28y = 63
--------------------------
43y = 43 | :43
y=1
7x - 3y = 4 | *4
5x + 4y = 9 | *3
28x-12y=16
15x+12y=27
---------------------------
43x=43 | :43
x=1
Odp: x = 1, y = 1
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7x - 3y = 4 | *(-5)
5x + 4y = 9 | *7
-35x + 15y = -20
35x + 28y = 63
--------------------------
43y = 43 | :43
y=1
7x - 3y = 4 | *4
5x + 4y = 9 | *3
28x-12y=16
15x+12y=27
---------------------------
43x=43 | :43
x=1
Odp: x = 1, y = 1