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x in (-oo:+oo)
(a+b)/a = 16.18 // - 16.18
(a+b)/a-16.18 = 0
(a+b)/a+(-16.18*a)/a = 0
a-16.18*a+b = 0
b-15.18*a = 0
(b-15.18*a)/a = 0
(b-15.18*a)/a = 0 // * a
b-15.18*a = 0
x belongs to the empty set
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