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l: -3/4x + y + 1 = 0
m: -3x + 4y + 4 = 0
n: 3x - 4y + 4 = 0
o: 3x - 4y + 6 = 0
p: 3x - 4y + 4 = 0
r: -3/2x + 2y - 2 = 0
teraz widać, że te same proste to n i p