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a in (-oo:+oo)
-32 = 2*a+a-8 // - 2*a+a-8
8-(2*a)-a-32 = 0
8-2*a-a-32 = 0
-3*a-24 = 0 // + 24
-3*a = 24 // : -3
a = 24/(-3)
a = -8
a = -8
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