14/21=2x/3x

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Solution for 14/21=2x/3x equation: 


x in (-oo:+oo)

14/21 = ((2*x)/3)*x // - ((2*x)/3)*x

14/21-(((2*x)/3)*x) = 0

(-2/3)*x^2+14/21 = 0

-2/3*x^2 = -2/3 // : -2/3

x^2 = 1

x^2 = 1 // ^ 1/2

abs(x) = 1

x = 1 or x = -1

x in { 1, -1 }

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