If qrst is a rectangle, find the value of x if angle q is equal to 5x+30

A rectangle is a four-sided flat shape where every angle is a right angle (90°). 

 

   

   

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?