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x in (-oo:+oo)
(10/11)*x-(5/11) = 6 // - 6
(10/11)*x-(5/11)-6 = 0
(10/11)*x-5/11-6 = 0
10/11*x-71/11 = 0 // + 71/11
10/11*x = 71/11 // : 10/11
x = 71/11/10/11
x = 71/10
x = 71/10
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