(2/5x)(-7/20x)=4 - solution

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Solution for (2/5x)(-7/20x)=4 equation:

x in (-oo:+oo)

(2/5)*(-7/20)*x*x = 4 // - 4

(2/5)*(-7/20)*x*x-4 = 0

-7/50*x^2 = 4 // : -7/50

x^2 = -200/7

x belongs to the empty set

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