Discrete Math - find sets A, B so A is an element of B, and

[phoenixwhiterose]

Find two sets A and B such that A is an element of B and A is a subset of B.

Any help would be appreciated, I don't even know where to start.

 

[pka]

\(\displaystyle \L
A = \{ x\} \quad \& \quad B = \left\{ {x,\left\{ x \right\}} \right\}\)