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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
73.4/x = 25.9/37.4 // - 25.9/37.4
73.4/x-(25.9/37.4) = 0
73.4/x-0.69251337 = 0
73.4*x^-1 = 0.69251337 // : 73.4
x^-1 = 0.00943479
-1 < 0
1/(x^1) = 0.00943479 // * x^1
1 = 0.00943479*x^1 // : 0.00943479
105.99070038 = x^1
x = 105.99070038
x = 105.99070038
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