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# Algebraic expression help?

half of the difference of a number and 15

### 4 Answers

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- RajendiranLv 69 years agoFavorite Answer
If the number is greater than 15,

(x - 15)/2 and if the number is

smaller than 15, (15 - x)/2.

- 9 years ago
you havent really given enough information to solve this problem but ill try my best

ill assume that you want 15 - x = x

x would equal 7.5 as that is half of 15

- john christopherLv 49 years ago
( x - 15 ) / 2

( x - 15 ) / 2

= x - 15 / 2

= 2x - 15

= 2x = 15

= 2x / 2 = 15 / 2

= x = 7.5

( x - 15 ) / 2

= ( 7.5 - 15 ) / 2

= - 7.5 / 2

= - 3.75

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