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Y+3 = (4/5)*(x-6) // - (4/5)*(x-6)
Y-((4/5)*(x-6))+3 = 0
(-4/5)*(x-6)+Y+3 = 0
Y-4/5*(x-6)+3 = 0
Y-4/5*(x-6)+3 = 0
Y-4/5*x+3+24/5 = 0
Y-4/5*x+39/5 = 0
Y-4/5*x+39/5 = 0
Y-4/5*x+39/5 = 0 // - Y+39/5
-4/5*x = -(Y+39/5) // : -4/5
x = (-(Y+39/5))/(-4/5)
x = 5/4*(Y+39/5)
x = 5/4*(Y+39/5)
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