5/3t-2/3 (t+4)=1. what is the value of t

In trapezoid klmn, kj=19.2 and jm=22.5. identify ln.

Given: hf || jk; hg ? jg prove: fhg ? kjg to prove that the triangles are congruent by asa, which statement and reason could be used as part of the proof? fgh ? kgj because vertical angles are congruent. jkg ? hfg because vertical angles are congruent. fhg ? jkg because right angles are congruent. hfg ? kjg because alternate interior angles are congruent.

I'm confused on this could anyone me and show me what i need to do to solve it.