If the tan x equals three fifths, what is y?

How do you solve a question like this?

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

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.