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x in (-oo:+oo)
0.25 = x/4.5 // - x/4.5
0.25-(x/4.5) = 0
0.25-0.22222222*x = 0
0.25-0.22222222*x = 0 // - 0.25
-0.22222222*x = -0.25 // : -0.22222222
x = -0.25/(-0.22222222)
x = 1.12500001
x = 1.12500001
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