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x in (-oo:+oo)
x/3.6 = 8 // - 8
x/3.6-8 = 0
0.27777778*x-8 = 0 // + 8
0.27777778*x = 8 // : 0.27777778
x = 8/0.27777778
x = 28.79999977
x = 28.79999977
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