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x in (-oo:+oo)
y = -((1/4)*(x-5))-8 // + -((1/4)*(x-5))-8
(1/4)*(x-5)+y+8 = 0
1/4*(x-5)+y+8 = 0
1/4*(x-5)+y+8 = 0
1/4*x+y-5/4+8 = 0
1/4*x+y+27/4 = 0
1/4*x+y+27/4 = 0
1/4*x+y+27/4 = 0 // - y+27/4
1/4*x = -(y+27/4) // : 1/4
x = (-(y+27/4))/1/4
x = -4*(y+27/4)
x = -4*(y+27/4)
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