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B in (-oo:+oo)
-0.4 = B/16 // - B/16
-(B/16)-0.4 = 0
-1/16*B-0.4 = 0 // + 0.4
-1/16*B = 0.4 // : -1/16
B = 0.4/(-1/16)
B = -6.4
B = -6.4
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