21x/7x=5

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Solution for 21x/7x=5 equation: 


x in (-oo:+oo)

((21*x)/7)*x = 5 // - 5

((21*x)/7)*x-5 = 0

3*x^2 = 5 // : 3

x^2 = 5/3

x^2 = 5/3 // ^ 1/2

abs(x) = (5/3)^(1/2)

x = (5/3)^(1/2) or x = -(5/3)^(1/2)

x in { (5/3)^(1/2), -(5/3)^(1/2) }

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