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Y-4 = (-4/3)*(x+6) // - (-4/3)*(x+6)
Y-((-4/3)*(x+6))-4 = 0
(4/3)*(x+6)+Y-4 = 0
4/3*(x+6)+Y-4 = 0
4/3*(x+6)+Y-4 = 0
Y+4/3*x-4+8 = 0
Y+4/3*x+4 = 0
Y+4/3*x+4 = 0
Y+4/3*x+4 = 0 // - Y+4
4/3*x = -(Y+4) // : 4/3
x = (-(Y+4))/4/3
x = -3/4*(Y+4)
x = -3/4*(Y+4)
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