1. The problem statement, all variables and given/known data y' + 3y = t + exp(2t) 2. Relevant equations 3. The attempt at a solution My solution is y = t/3 + exp(-2t) -1/9 + c. The solution in the back of the book is y = cexp(-3t) + (t/3) - (1/9) + exp(-2t). How come the two solutions differ so vastly? I followed the procedure outlined in the textbook precisely.