Verified Answer :

RhysH

There are no solutions as when expanded out the brackets the 3x and the 3x cancel each other out. 
To show this, 
(/3)   x+13/3 = x + 6 +1/3
x + 13/3 = x + 19/3
x = x + 2
which shows there are no solutions as x does not equal x

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