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y-8 = (-4/5)*(x-6) // - (-4/5)*(x-6)
y-((-4/5)*(x-6))-8 = 0
(4/5)*(x-6)+y-8 = 0
4/5*(x-6)+y-8 = 0
4/5*(x-6)+y-8 = 0
4/5*x+y-8-24/5 = 0
4/5*x+y-64/5 = 0
4/5*x+y-64/5 = 0
4/5*x+y-64/5 = 0 // - y-64/5
4/5*x = -(y-64/5) // : 4/5
x = (-(y-64/5))/4/5
x = 5/4*(64/5-y)
x = 5/4*(64/5-y)
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