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x in (-oo:+oo)
(-2/5)*x = -14.5 // + 14.5
(-2/5)*x+14.5 = 0
14.5-2/5*x = 0 // - 14.5
-2/5*x = -14.5 // : -2/5
x = -14.5/(-2/5)
x = 36.25
x = 36.25
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