Pearson Algebra 1 Common Core, 2011
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Pearson Algebra 1 Common Core, 2011 View details
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Exercise 1 Page 723

When adding or subtracting fractions, they should have the same denominator. In this exercise, we have two fractions with different denominators.
Since both denominators are prime numbers, we have to multiply each fraction by the denominator of the other fraction. First we multiply the numerator and denominator of by Then we can do the same and multiply by to create a common denominator.
Now that we have a common denominator, we can proceed to simplifying the expression.