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a in (-oo:+oo)
2-4*a = 6*a+32/11 // - 6*a+32/11
2-4*a-(6*a)-(32/11) = 0
2-4*a-6*a-32/11 = 0
-10*a-10/11 = 0 // + 10/11
-10*a = 10/11 // : -10
a = 10/11/(-10)
a = -1/11
a = -1/11
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