Any idea where I go wrong? The two equations in the system are:

(1)

(2)

Now trying to simplify:

(1;2)

(2;2)

Substituting 2;2 into 1;2 ->

then ??? what??? IF x = y, then the original equation doesn´t hold: ???

Solving this seemingly rediculously easy equationssystems for last 40min,

Oh the correct answer should be