7x^3-14x/5x^3

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Solution for 7x^3-14x/5x^3 equation: 


x in (-oo:+oo)

7*x^3-(((14*x)/5)*x^3) = 0

(-14/5)*x^4+7*x^3 = 0

7*x^3-14/5*x^4 = 0

7*x^3*(1-2/5*x) = 0

1-2/5*x = 0 // - 1

-2/5*x = -1 // : -2/5

x = -1/(-2/5)

x = 5/2

7*x^3 = 0

7*x^3 = 0 // : 7

x^3 = 0

x = 0

x in { 5/2, 0 }

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