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x in (-oo:+oo)
y = (4/3)*x+16/3-4 // - (4/3)*x+16/3-4
y-((4/3)*x)-(16/3)+4 = 0
(-4/3)*x+y-16/3+4 = 0
y-4/3*x-4/3 = 0 // - y-4/3
-4/3*x = -(y-4/3) // : -4/3
x = (-(y-4/3))/(-4/3)
x = -3/4*(4/3-y)
x = -3/4*(4/3-y)
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