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-2y = -3x - 6
2y = 3x + 6
y = 3/2x + 3
y = mx + c
m = 3/2
karena tegak lurus, maka :
m1 . m2 = -1
3/2 . m2 = -1
m2 = -2/3
y - b = m(x - a)
y - (-2) = -2/3(x - 6)
y + 2 = -2/3x + 4
kalikan 3
3y + 6 = -2x + 12
3y + 2x + 6 - 12 = 0
3y + 2x - 6 = 0