Addition And Subtraction Rational Fractional Expression

                    Lesson 1


                                                            Problem:                   Solve the problem.


y/4 + 2y/8 

                                                            Solution                    Factor all the given values and find the least common denominator

Step 1:  


                                                                                Solution                          Multiply the numerators and the denominators by the appropriate denominator

Step 2:                        so that the denominator becomes the least common denominator i.e.  




                                                                                Solution                          Add the numerator i.e. 4y/8 = y/2

Step 3:           


Solution                          Since the fraction cannot be factored further.

Step 4:           


                                                            Solution                    The answer is: y/2




                                                             Try two practice problems:  


Solve the following rational fractional expression. 


x/5 + 4x/15 2x/5


6x/16 4x/16




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