21x/3x=5/35

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Solution for 21x/3x=5/35 equation: 


x in (-oo:+oo)

((21*x)/3)*x = 5/35 // - 5/35

((21*x)/3)*x-(5/35) = 0

((21*x)/3)*x-1/7 = 0

7*x^2 = 1/7 // : 7

x^2 = 1/49

x^2 = 1/49 // ^ 1/2

abs(x) = 1/7

x = 1/7 or x = -1/7

x in { 1/7, -1/7 }

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