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x in (-oo:+oo)
y-2 = (3/8)*(x-1) // - (3/8)*(x-1)
y-((3/8)*(x-1))-2 = 0
(-3/8)*(x-1)+y-2 = 0
y-3/8*(x-1)-2 = 0
y-3/8*(x-1)-2 = 0
y-3/8*x-2+3/8 = 0
y-3/8*x-13/8 = 0
y-3/8*x-13/8 = 0
y-3/8*x-13/8 = 0 // - y-13/8
-3/8*x = -(y-13/8) // : -3/8
x = (-(y-13/8))/(-3/8)
x = -8/3*(13/8-y)
x = -8/3*(13/8-y)
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