Is it possible to prove this set inequality given the constraints?

[ainster31]

Homework Statement

Homework Equations

I have to use these set identities:

The Attempt at a Solution

Pretty sure this is impossible since it's an inequality.

 

[mfb]

Pretty sure this is impossible since it's an inequality.

I thunk you can convert the inequality in two equalities with the right set and theorem 6.2.3.

 

[ainster31]

I thunk you can convert the inequality in two equalities with the right set and theorem 6.2.3.

Nice, I proved it using this and it only took 19 steps.