Partial derivative equation problem

[RenOdur]

well i have been trying to solve this equation and i just can't...
the solution is given and it's at the second pdf file but i can't understand the procedure can somebody please help?

 

[Axiom17]

Have you done any calculations at all yet as an attempt? What do you think you should do?

Hint: Think about what you know about partial derivatives, and also how you could get those equations into the forms required to help obtain the answers.

 

[RenOdur]

well i initially thought about integration...but really i have no clue about it since i haven't be teached yet how to solve nonlinear differential equations(at least that's what I think this equation is,correct me if I'm wrong)

 

[HallsofIvy]

No, that is not a non-linear partial differential equation. Why would you think it is non-linear?

 

[RenOdur]

ok so it's a linear partial differential equation...i'll try some ways out and if I still can't solve it i'll let you know:)