I need help showing me how to do some problems..

Question

5. 28-0.3y = 0.7y-12
I got 10/400 or 0.025..

and
3c-4c+1=5c+2+3
I ended up getting c=1 but the book says it's wrong too.. What am I doing wrong?

Answer 1

I figured out number 5.
I'm still having problems with the other one though.