Multi step equations with variables on both sides 7a=3a+20

Plz asap can y’all explain step by step plzzz it’s for a homework

F(x) = (x^2 + 3x − 4) and g (x) = (x+4) find f/g and state the domain.

Can someone me and do the problem plz so i can understand it more better

Sarah used her calculator to find sin 125 degrees. she wrote down sin sin125 degrees.57. how could sarah recognize that her answer is incorrect?