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x in (-oo:+oo)
x/13 = 11/8 // - 11/8
x/13-(11/8) = 0
x/13-11/8 = 0
1/13*x-11/8 = 0 // + 11/8
1/13*x = 11/8 // : 1/13
x = 11/8/1/13
x = 143/8
x = 143/8
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