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Ubah ke bentuk mx + y - c = 0
5x - 2y + 7 = 0
m = -a/b
= -5/-2
= 5/2
m1 × m2 = -1
5/2 × m2 = -1
m2 = -2/5
y - y1 = m (x - x1)
y - 5 = -2/5 (x - 3) --> kali 5
5y - 25 = -2 (x - 3)
5y - 25 = -2x + 6
5y + 2x = 6 + 25
5y + 2x = 31