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a in (-oo:+oo)
2*a-4*a+8/9 = 224/9 // - 224/9
2*a-4*a+8/9-(224/9) = 0
2*a-4*a+8/9-224/9 = 0
-2*a-24 = 0 // + 24
-2*a = 24 // : -2
a = 24/(-2)
a = -12
a = -12
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