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Carmel wants to become a “Fraction Master.” He has come to you for instruction.

  1. Help Carmel by demonstrating and explaining every step necessary to simplify the problem at right.

    Change to common denominator.

    Now just subtract the fractions.

  1. Oh no!” exclaimed Carmel. “This one is hard!” Show him every step he needs to simplify the problem at right. (Note that from this point on in the course, you may assume that all values of a variable that would make a denominator zero are excluded.)

Change to common denominator. (2xy)

Add the fractions to get one fraction.