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a in (-oo:+oo)
8 = (4/11)*a // - (4/11)*a
8-((4/11)*a) = 0
(-4/11)*a+8 = 0
8-4/11*a = 0 // - 8
-4/11*a = -8 // : -4/11
a = -8/(-4/11)
a = 22
a = 22
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