Find the value of x then classify the triangle by its angles

Triangle = 180°
180 - (81+84)= 15
15°= x
the triangle is acute

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?