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a in (-oo:+oo)
(1/3)*a-(6*a)-8 = 146/3 // - 146/3
(1/3)*a-(6*a)-(146/3)-8 = 0
(1/3)*a-6*a-146/3-8 = 0
-17/3*a-170/3 = 0 // + 170/3
-17/3*a = 170/3 // : -17/3
a = 170/3/(-17/3)
a = -10
a = -10
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