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x in (-oo:+oo)
Y-8 = (1/4)*(x-3) // - (1/4)*(x-3)
Y-((1/4)*(x-3))-8 = 0
(-1/4)*(x-3)+Y-8 = 0
Y-1/4*(x-3)-8 = 0
Y-1/4*(x-3)-8 = 0
Y-1/4*x-8+3/4 = 0
Y-1/4*x-29/4 = 0
Y-1/4*x-29/4 = 0
Y-1/4*x-29/4 = 0 // - Y-29/4
-1/4*x = -(Y-29/4) // : -1/4
x = (-(Y-29/4))/(-1/4)
x = -4*(29/4-Y)
x = -4*(29/4-Y)
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