21-10x/35x

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Solution for 21-10x/35x equation: 


x in (-oo:+oo)

21-(((10*x)/35)*x) = 0

(-2/7)*x^2+21 = 0

-2/7*x^2 = -21 // : -2/7

x^2 = 147/2

x^2 = 147/2 // ^ 1/2

abs(x) = (147/2)^(1/2)

x = (147/2)^(1/2) or x = -(147/2)^(1/2)

x in { (147/2)^(1/2), -(147/2)^(1/2) }

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