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Gradien beda ruas = x/y
Gradien sama ruas = -x/y
2y = 6x - 4
Gradien beda ruas = x/y = 6/2 : 3
10x - 6y + 5 = 0
Gradien sama ruas = -x/y = -10/-6 = 5/3 = 1 2/3