Can anyone do my imagine math and get me 6 certificates (pass the lessons) i need it today before 5

If f(x)= 3x+6 which of the following is the inverse of f(x)

Find the solution of this system of equation -7x+y=-20 9x-3y=36

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.