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x in (-oo:+oo)
x/10 = x/11-13 // - x/11-13
x/10-(x/11)+13 = 0
1/110*x+13 = 0 // - 13
1/110*x = -13 // : 1/110
x = -13/1/110
x = -1430
x = -1430
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