Odpowiedź:
a) 3x - 2y = 3 I×3
5x + 6y = 5
9x - 6y = 9
5x + 6y = 5 (dodajemy obustronnie)
14x = 14
x = 1
3 - 2y = 3
-2y = 0
y = 0
b) 5x + 2y = 4 I×(-2)
3x + 4y = -6
-10x - 4y = -8
3x + 4y = -6 (dodajemy obustronnie)
-7x = -14
x = 2
10 + 2y = 4
2y = -6
y = -3
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Odpowiedź:
a) 3x - 2y = 3 I×3
5x + 6y = 5
9x - 6y = 9
5x + 6y = 5 (dodajemy obustronnie)
14x = 14
x = 1
3 - 2y = 3
-2y = 0
y = 0
b) 5x + 2y = 4 I×(-2)
3x + 4y = -6
-10x - 4y = -8
3x + 4y = -6 (dodajemy obustronnie)
-7x = -14
x = 2
10 + 2y = 4
2y = -6
y = -3