3(x+2)=2(x-3)+2 what is the solution?

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

Answer this question, only if you know the answer. 30 points and brainliest!

What is the 12th term of b(n)=-4-2(n-1)