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x in (-oo:+oo)
6*x+2/9 = x-68/99 // - x-68/99
6*x-x+2/9-(-68/99) = 0
6*x-x+2/9+68/99 = 0
5*x+10/11 = 0 // - 10/11
5*x = -10/11 // : 5
x = -10/11/5
x = -2/11
x = -2/11
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