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For rational numbers a, B, C, D, a kind of operation a, B = ad BC is defined. Then when - 2x 4 = 14, C, D (1-x) 5 can find the value of X
|2×4||（1-x）×5|=2×5-4（1-x）=10-4+4x=6+4x=14
4x=8
x=2
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