What is the answer to the math problem 17-3=16- ?

Me! #1 write an equation for the interior angles of this triangle that uses the triangle sum theorem. #2 what is the value of x? #3 what is the measure of #4 classify the triangle above as acute, obtuse, or right. state your reason in a complete sentence.

Asap! i'm not good math and i'm lost.

Ineed someone to me answer my question i have to have this done and knocked out