64=72-x2/18

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Solution for 64=72-x2/18 equation: 


x in (-oo:+oo)

64 = 72-((x^2)/18) // - 72-((x^2)/18)

(x^2)/18-72+64 = 0

1/18*x^2 = 8 // : 1/18

x^2 = 144

x^2 = 144 // ^ 1/2

abs(x) = 12

x = 12 or x = -12

x in { 12, -12 }

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