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x in (-oo:+oo)
x/126 = 1/3 // - 1/3
x/126-(1/3) = 0
x/126-1/3 = 0
1/126*x-1/3 = 0 // + 1/3
1/126*x = 1/3 // : 1/126
x = 1/3/1/126
x = 42
x = 42
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