Divide the sum of 13/5 and -12/7 by the product of -31/7 and 1/2.
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Step-by-step explanation:
[13\5+(-12\7)] ÷ [-31\7×1\2]
= 31\35 ÷ -31\14
= 31\35 × -14\31
= -14\35
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