A pizza that was ordered for a party was already cut into 6 slices of each serving of pizza was 1/3 of a slice how many servings of pizza were available

Which of the following questions describes the equation g + (-4) = -5? a)what number, when added to negative four, is equal to negative five? b)what number, when added to negative five, is equal to negative four? c)what number, when subtracted from negative four, is equal to negative five? d)what number, when subtracted from negative five, is equal to negative four?