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x in (-oo:+oo)
9/2 = x/8.2 // - x/8.2
9/2-(x/8.2) = 0
9/2-0.12195122*x = 0
9/2-0.12195122*x = 0 // - 9/2
-0.12195122*x = -9/2 // : -0.12195122
x = -9/2/(-0.12195122)
x = 36.89999985
x = 36.89999985
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