find the equation to the plane through the point ( 2,2,1) and (9,3,6) and perpendicular to the Plane 2 X + 6 Y + 6Z = 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.