Please help on this question :(

S-7< 3 i need answering this problem someone asap answer

Brent wants to know what is 5 x 1/2

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.