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If a new operation is defined and the absolute value of ABCD = ad BC, then when the absolute value of 2x4x = 27, x =? The absolute value of ABCD is | ab | the absolute value of 2x4x connecting the upper and lower two | 2 4 | connecting the upper and lower two |cd| |x x| |
2x-4x=27,x=-27/2
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