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x in (-oo:+oo)
(-2/19)*(y-120) = x // - x
(-2/19)*(y-120)-x = 0
-2/19*(y-120)-x = 0
-2/19*(y-120)-x = 0
240/19-x-2/19*y = 0
240/19-x-2/19*y = 0
240/19-x-2/19*y = 0 // - 240/19-2/19*y
-x = -(240/19-2/19*y) // * -1
x = 240/19-2/19*y
x = 240/19-2/19*y
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