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x in (-oo:+oo)
x/11 = x/12-11 // - x/12-11
x/11-(x/12)+11 = 0
1/132*x+11 = 0 // - 11
1/132*x = -11 // : 1/132
x = -11/1/132
x = -1452
x = -1452
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