7x^2/5=77

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Solution for 7x^2/5=77 equation: 


x in (-oo:+oo)

(7*x^2)/5 = 77 // - 77

(7*x^2)/5-77 = 0

7/5*x^2 = 77 // : 7/5

x^2 = 55

x^2 = 55 // ^ 1/2

abs(x) = 55^(1/2)

x = 55^(1/2) or x = -55^(1/2)

x in { 55^(1/2), -55^(1/2) }

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