Write an algebraic equation that models the following statement. Twice the sum of 'x' and '4' is six less than the quotient of 'q' and '9'.

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.