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x in (-oo:+oo)
a = (7/4)*(h-51) // - (7/4)*(h-51)
a-((7/4)*(h-51)) = 0
(-7/4)*(h-51)+a = 0
a-7/4*(h-51) = 0
a-7/4*(h-51) = 0
a-7/4*h+357/4 = 0
a-7/4*h+357/4 = 0
x belongs to the empty set
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