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a in (-oo:+oo)
8-5*a = 34/3 // - 34/3
8-5*a-(34/3) = 0
8-5*a-34/3 = 0
-5*a-10/3 = 0 // + 10/3
-5*a = 10/3 // : -5
a = 10/3/(-5)
a = -2/3
a = -2/3
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