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y-4 = (-4/3)*(x-4) // - (-4/3)*(x-4)
y-((-4/3)*(x-4))-4 = 0
(4/3)*(x-4)+y-4 = 0
4/3*(x-4)+y-4 = 0
4/3*(x-4)+y-4 = 0
4/3*x+y-16/3-4 = 0
4/3*x+y-28/3 = 0
4/3*x+y-28/3 = 0
4/3*x+y-28/3 = 0 // - y-28/3
4/3*x = -(y-28/3) // : 4/3
x = (-(y-28/3))/4/3
x = 3/4*(28/3-y)
x = 3/4*(28/3-y)
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