At the beginning of a laboratory experiment, the temperature of a substance is -12.6 degrees celsius. During the experiment, the temperature of the substance decrease 7.5 degrees celsius. What is the final temperature of the substance?

At the beginning of a laboratory experiment, the temperature of a substance is -12.6 degrees celsius. During the experiment, the temperature of the substance decrease 7.5 degrees celsius. What is the final temperature of the substance?

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