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D( x )
149.352-(3.81*x) = 0
149.352-(3.81*x) = 0
149.352-(3.81*x) = 0
149.352-3.81*x = 0
149.352-3.81*x = 0 // - 149.352
-3.81*x = -149.352 // : -3.81
x = -149.352/(-3.81)
x = 39.2
x in (-oo:39.2) U (39.2:+oo)
0.5333 = (149.352-(39.2*x))/(149.352-(3.81*x)) // - (149.352-(39.2*x))/(149.352-(3.81*x))
0.5333-((149.352-(39.2*x))/(149.352-(3.81*x))) = 0
0.5333-((149.352-39.2*x)/(149.352-3.81*x)) = 0
(-1*(149.352-39.2*x))/(149.352-3.81*x)+0.5333 = 0
(-1*(149.352-39.2*x))/(149.352-3.81*x)+(0.5333*(149.352-3.81*x))/(149.352-3.81*x) = 0
0.5333*(149.352-3.81*x)-1*(149.352-39.2*x) = 0
37.168127*x-69.7025784 = 0
(37.168127*x-69.7025784)/(149.352-3.81*x) = 0
(37.168127*x-69.7025784)/(149.352-3.81*x) = 0 // * 149.352-3.81*x
37.168127*x-69.7025784 = 0
37.168127*x-69.7025784 = 0 // + 69.7025784
37.168127*x = 69.7025784 // : 37.168127
x = 69.7025784/37.168127
x = 1.87533201
x = 1.87533201
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