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x in (-oo:+oo)
(1/2)*x+8 = 91/11 // - 91/11
(1/2)*x-(91/11)+8 = 0
(1/2)*x-91/11+8 = 0
1/2*x-3/11 = 0 // + 3/11
1/2*x = 3/11 // : 1/2
x = 3/11/1/2
x = 6/11
x = 6/11
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