Help!!!

Find an implicit and an explicit solution of the given initial value problems.

a) dy/dt+2y=1, when y(0)=5/2

Mr F says: Many approaches are possible. Here are three: 1. Use the integrating factor method. 2. The DE is seperable: dt/dy = 1/(1 - 2y). 3. First order linear with constant coefficients. Assume a solution of the form y = . Hint: B = 1/2, A is an arbitrary constant. Now find .
b) (1+x^4)dy+x(1+4y^2)dx=0, when y(1)=0

Mr F says: The DE is seperable: . The y-integration is a standard form. For the x-integration, make the substitution u = x^2.
Thanks a lot!!!