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Answers by Julie A.

-5 - (+2) = (answer)

the first - represents a negative value.  Here you are starting with a value of negative 5, or 5 less than 0. The second - represents subtraction. It might be easier to view it as (-5) - (+2) = X.  So if you are start with negative 5 and taking away 2 more, then you have negative 7...