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x in (-oo:+oo)
x/2.2 = 22 // - 22
x/2.2-22 = 0
0.45454545*x-22 = 0 // + 22
0.45454545*x = 22 // : 0.45454545
x = 22/0.45454545
x = 48.40000048
x = 48.40000048
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