16=1/9x^2

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Solution for 16=1/9x^2 equation: 


x in (-oo:+oo)

16 = (1/9)*x^2 // - (1/9)*x^2

16-((1/9)*x^2) = 0

(-1/9)*x^2+16 = 0

-1/9*x^2 = -16 // : -1/9

x^2 = 144

x^2 = 144 // ^ 1/2

abs(x) = 12

x = 12 or x = -12

x in { 12, -12 }

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