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x in (-oo:+oo)
y = (-5/6)*x-(7/2) // - (-5/6)*x-(7/2)
y-((-5/6)*x)+7/2 = 0
(5/6)*x+y+7/2 = 0
5/6*x+y+7/2 = 0 // - y+7/2
5/6*x = -(y+7/2) // : 5/6
x = (-(y+7/2))/5/6
x = -6/5*(y+7/2)
x = -6/5*(y+7/2)
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