The temperature in Leeming at midnight was −k∘C-k^{\circ}\text{C}−k∘C, where k k\,k is positive. The temperature in Leeming at midday was 8∘C8^{\circ}\text{C}8∘C.
Work out the difference between the temperature in Leeming at midnight and midday. Give your answer in terms of kkk.
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