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6-83.

Stoplight iconAdd or subtract and simplify each of the following expressions. Justify that each step of your process makes sense. Homework Help ✎

  1. Because the denominators are the same, simply add the numerators.

  2. To get a common denominator:

    Multiply the first fraction by 

    and the second fraction by 

    When subtracting, distribute the negative to all terms in the numerator of the second fraction.