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x in (-oo:+oo)
3/20 = (2*x)/(-25) // - (2*x)/(-25)
3/20-((2*x)/(-25)) = 0
(2/25)*x+3/20 = 0
2/25*x+3/20 = 0 // - 3/20
2/25*x = -3/20 // : 2/25
x = -3/20/2/25
x = -15/8
x = -15/8
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