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12-16.
  1. Use your understanding of adding fractions to add the algebraic expressions below. Then simplify your solutions, if possible. Homework Help ✎

    1. 12-16a

    2. 12-16b

Because the denominators are the same, you can add the numerators together.

Factor 9 out of the numerator and simplify the equation by looking for factors that make 1.

9

Subtract the numerators, then try factoring.
Be sure to distribute the negative when performing the subtraction.

Look for factors that make 1.