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Verified answer
Bab Persamaan GarisMatematika SMP Kelas VIII
(y - y1) / (y2 - y1) = (x - x1) / (x2 - x1)
(y - 7) / (-1 - 7) = (x - (-4)) / (-3 - (-4))
(y - 7) / (-8) = (x + 4) / 1
y - 7 = (-8) . (x + 4)
y - 7 = -8x - 32
8x + y - 7 + 32 = 0
8x + y + 25 = 0