Hi,

One needs Like terms in order to combine the terms:

that is: fractions must have a common denominator.

Giving them one... is the place to start:

7/(x+8) - 3/(x-8) 

7(x-8)/(x+8)(x-8) - 3(x+8)/(x-8)(x+8) 

( 7x-56 - 3x -24)/(x-8)(x+8) 

( 7x-56 - 3x -24)/(x-8)(x+8) 

 (4x-80)/(x-8)(x+8) 

or

 4(x-20)/(x-8)(x+8) 

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