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x in (-oo:+oo)
13 = (2/25)*x-3 // - (2/25)*x-3
3-((2/25)*x)+13 = 0
(-2/25)*x+3+13 = 0
16-2/25*x = 0 // - 16
-2/25*x = -16 // : -2/25
x = -16/(-2/25)
x = 200
x = 200
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