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y=-2x
-2x-4y=3 (po redukcji)
y=-2x
-2x-4 ×-2x=3
y=-2x
6x=3 /:6
x=1/2
y=-2 × 1/2
y= -1
y= -2x
wstawiam y do pierwszego rownania:
x²-2x+1-4x²+8x-4 = x² - 4x²
y= -2x
dalej:
6x = 3
y=-2x
więc:
x = ½
y = -1