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3y = -4x +6
y = -4/3x +6/3
y = -4/3x +2
maka, m = -4/3
y -y₁ = m(x -x₁)
y -3 = -4/3(x -2)
y -3 = -4/3x +8/3 dikali 3 untuk menghilangkan penyebut, sehingga
3y -9 = -4x +8
3y = -4x +8 +9
3y = -4x +17
4x +3y -17 = 0