30=2x/-5x

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Solution for 30=2x/-5x equation: 


x in (-oo:+oo)

30 = ((2*x)/(-5))*x // - ((2*x)/(-5))*x

30-(((2*x)/(-5))*x) = 0

(2/5)*x^2+30 = 0

2/5*x^2 = -30 // : 2/5

x^2 = -75

x belongs to the empty set

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