Take any nonabelian group, and elements a,x so that ax is not xa.  Let b=c=e.  You can solve for d so that ax=xd.  By hypothesis, d is not equal to a.
Give an example of a group with elements a, b, c, d, and x such that axb = cxd but ab != cd?
well, if the numbers don't have to be consequtive, it can really  be anything:
a=1
b=5
c=10
d=120
x=0
as long as x=0, there are a ton of solutions. 
however, if there has to be some order to these numbers, i'm stumped
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