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w in (-oo:+oo)
w/2.2 = 5 // - 5
w/2.2-5 = 0
0.45454545*w-5 = 0 // + 5
0.45454545*w = 5 // : 0.45454545
w = 5/0.45454545
w = 11.00000011
w = 11.00000011
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