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x in (-oo:+oo)
0.1*x+x/0.1 = 20.2 // - 20.2
0.1*x+x/0.1-20.2 = 0
10.1*x-20.2 = 0 // + 20.2
10.1*x = 20.2 // : 10.1
x = 20.2/10.1
x = 2
x = 2
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