7x^2/3-343=0

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Solution for 7x^2/3-343=0 equation: 


x in (-oo:+oo)

(7*x^2)/3-343 = 0

7/3*x^2 = 343 // : 7/3

x^2 = 147

x^2 = 147 // ^ 1/2

abs(x) = 7*3^(1/2)

x = 7*3^(1/2) or x = -(7*3^(1/2))

x in { 7*3^(1/2), -(7*3^(1/2)) }

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