I have 20 min left just need the answer

Solve 2x+y=3 x+y=5 in substitution method

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

15 points what is the end behavior of this graph? & what is the asymptote of this graph?