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x in (-oo:+oo)
Y-8 = (5/4)*(x-(-3/5)) // - (5/4)*(x-(-3/5))
Y-((5/4)*(x-(-3/5)))-8 = 0
(-5/4)*(x+3/5)+Y-8 = 0
Y-5/4*(x+3/5)-8 = 0
Y-5/4*(x+3/5)-8 = 0
Y-5/4*x-8-3/4 = 0
Y-5/4*x-35/4 = 0
Y-5/4*x-35/4 = 0
Y-5/4*x-35/4 = 0 // - Y-35/4
-5/4*x = -(Y-35/4) // : -5/4
x = (-(Y-35/4))/(-5/4)
x = -4/5*(35/4-Y)
x = -4/5*(35/4-Y)
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