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x in (-oo:+oo)
5/4 = x/6.55 // - x/6.55
5/4-(x/6.55) = 0
5/4-0.15267176*x = 0
5/4-0.15267176*x = 0 // - 5/4
-0.15267176*x = -5/4 // : -0.15267176
x = -5/4/(-0.15267176)
x = 8.18749977
x = 8.18749977
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