Ineed to know the work step by step

(x-5)1/2+5=2 what is a possible solution?

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?

Melody received $140 at the end of a certain week. how many customers did she advise that week?