-0.4=(X-100)*1.5/0.5*X

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Solution for -0.4=(X-100)*1.5/0.5*X equation: 


X in (-oo:+oo)

-0.4 = X*((1.5*(X-100))/0.5) // - X*((1.5*(X-100))/0.5)

-(X*((1.5*(X-100))/0.5))-0.4 = 0

-3*X*(X-100)-0.4 = 0

-3*X*(X-100)-0.4 = 0

300*X-3*X^2-0.4 = 0

300*X-3*X^2-0.4 = 0

300*X-3*X^2-0.4 = 0

DELTA = 300^2-(-3*(-0.4)*4)

DELTA = 89995.2

DELTA > 0

X = (89995.2^(1/2)-300)/(-3*2) or X = (-89995.2^(1/2)-300)/(-3*2)

X = (89995.2^(1/2)-300)/(-6) or X = (89995.2^(1/2)+300)/6

(X-((89995.2^(1/2)-300)/(-6)))*(X-((89995.2^(1/2)+300)/6)) = 0

(X-((89995.2^(1/2)-300)/(-6)))*(X-((89995.2^(1/2)+300)/6)) = 0

( X-((89995.2^(1/2)+300)/6) )

X-((89995.2^(1/2)+300)/6) = 0 // + (89995.2^(1/2)+300)/6

X = (89995.2^(1/2)+300)/6

( X-((89995.2^(1/2)-300)/(-6)) )

X-((89995.2^(1/2)-300)/(-6)) = 0 // + (89995.2^(1/2)-300)/(-6)

X = (89995.2^(1/2)-300)/(-6)

X in { (89995.2^(1/2)+300)/6, (89995.2^(1/2)-300)/(-6) }

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