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Y-8 = (3/4)*(x-4) // - (3/4)*(x-4)
Y-((3/4)*(x-4))-8 = 0
(-3/4)*(x-4)+Y-8 = 0
Y-3/4*(x-4)-8 = 0
Y-3/4*(x-4)-8 = 0
Y-3/4*x-8+3 = 0
Y-3/4*x-5 = 0
Y-3/4*x-5 = 0
Y-3/4*x-5 = 0 // - Y-5
-3/4*x = -(Y-5) // : -3/4
x = (-(Y-5))/(-3/4)
x = -4/3*(5-Y)
x = -4/3*(5-Y)
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