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x in (-oo:+oo)
x-(8/9) = -(x/8)-11 // + -(x/8)-11
x+x/8-(8/9)+11 = 0
x+x/8-8/9+11 = 0
9/8*x+91/9 = 0 // - 91/9
9/8*x = -91/9 // : 9/8
x = -91/9/9/8
x = -728/81
x = -728/81
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