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x in (-oo:+oo)
a = (9/4)*(h-65) // - (9/4)*(h-65)
a-((9/4)*(h-65)) = 0
(-9/4)*(h-65)+a = 0
a-9/4*(h-65) = 0
a-9/4*(h-65) = 0
a-9/4*h+585/4 = 0
a-9/4*h+585/4 = 0
x belongs to the empty set
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