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(y - 6)/- 9 = (x + 7) / 3
3y - 18 = - 9x - 63
9x + 3y + 45 = 0
2) substitusi (-2,k) ke dalam persamaan:
5(-2) - 2k - 8 = 0
- 10 - 2k - 8 = 0
2k = - 18
k = - 9
3) (y + 4) / (- 7 + 4) = (x - 6) / (- 3 - 6)
(y + 4) / - 3 = (x - 6) / - 9
- 9y - 36 = - 3x + 18
3x - 9y - 54 = 0