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a in (-oo:+oo)
118 = 8-6*a-(5*a) // - 8-6*a-(5*a)
5*a-(-6*a)-8+118 = 0
6*a+5*a-8+118 = 0
11*a+110 = 0 // - 110
11*a = -110 // : 11
a = -110/11
a = -10
a = -10
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