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2y - x + 4 = 0
m1 = -a/b
= - (-1) / 2
= 1/2
m1 = m2
y - y2 = m2 (x - x2)
y - 4 = 1/2 (x - 5)
2 (y - 4) = x -5
2y - 8 = x -5
2y = x + 3
untuk sejajar menggunakan rumus
y-b = m (x-a)
y-4 = 1/2 (x-5)
y-4 = 1/2x - 5/2
y = 1/2x -5/2 + 4/1
y = 1/2x + 3/2
atau kalau tidak dijadikan pecahan berarti
y = 1/2x + 3/2*2
2y = x + 3