Man help plzzz ive been struggling

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.

∆red ≅ ∆ by rule will give brainiest if possible

Measure of angles 31 (x+4) (3x+9) me