Andrea R. answered • 04/08/13
Tutor
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Stay-at-Home Mom with BSBA in Accounting and Human Resource Management
Since both denominators are 2 we only need to figure out (5x+8) - (5x-8).
5x - 5x is 0.
8 - -8 is the same as 8 + 8 so it is 16.
16 is our numerator. We need to put it with the denominator that is 2.
16 /2 reduces to 8.
We can check this by replacing x with 2.
(5*2+8) - (5*2-8) = (10+8) - (10-8) = 18 - 2 = 16
16 / 2 = 8
