+0  
 
0
583
1
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b/2 - b+a/2

b over 2 - b+a over 2

 Dec 11, 2016
edited by Guest  Dec 11, 2016
edited by Guest  Dec 11, 2016
edited by Guest  Dec 11, 2016
edited by Guest  Dec 11, 2016
edited by Guest  Dec 11, 2016
edited by Guest  Dec 11, 2016
edited by Guest  Dec 11, 2016
edited by Guest  Dec 11, 2016
edited by Guest  Dec 11, 2016
 #1
avatar+37084 
0

Not sure what you want....

 

(b/2 -b) + a/2 =

-b/2  + a/2   =

1/2 (a-b)  

 Dec 11, 2016

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