120-12x/15x

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Solution for 120-12x/15x equation: 


x in (-oo:+oo)

120-(((12*x)/15)*x) = 0

(-4/5)*x^2+120 = 0

-4/5*x^2 = -120 // : -4/5

x^2 = 150

x^2 = 150 // ^ 1/2

abs(x) = 5*6^(1/2)

x = 5*6^(1/2) or x = -(5*6^(1/2))

x in { 5*6^(1/2), -(5*6^(1/2)) }

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