I have an equation I need to solve. I have an answer but I don't have much confidence in it.

here is the problem:

"20 kg/m^3 = 1027 kg/m^3 + [.15 kg/m^3 (5 degrees C) + .78 kg/m^3(s-35)]. solve for s"

the answer I got is 94.16. please tell me if I am off and also please advise on how you got there. Many thanks.