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1Math 50 : Elementary Algebra - page 12 / 15

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Simplify.

79.

80.

81.  

82.  

83.  

84.  

Find the LCM.

85.     and  

86.  ,  

Write each expression in terms of the LCM of the denominator.

87.  

88.  

Simplify.

89.  

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