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(y - 3) / (9 - 3) = (x - 0) / (4 - 0)
(y-3)/6 = x/4
(y - 3)/6 x 24 = x/4 x 24
4y - 12 = 6x
4y = 6x + 12
(4y = 6x + 12) : 4
y = 3/2 x + 3
=
=
4 (y - 3) = 6.x
4y - 12 = 6x
- 6x + 4y - 12 = 0 ....bagi dengan - 2
3x - 2y + 6 = 0