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posted by peter on Thursday, December 19, 2013 at 3:54pm.
If #(a,b,c,d)means you subtract the sum of the terms from zero, and # (4,-8,11,d)=14, then d= answer and explain
#(a,b,c,d) = 0-(a+b+c+d) 0-(4+(-8)+11+d) = 14 -(d+7) = 14 d+7 = -14 d = -21
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