Question: Differential system

Hello fellow maple users,im new to the software,im trying to solve a differential system but it dosent work

 

This is the system :

DE1 := diff(Y(t), t) = 5*Y(t)*ln(b(t)/Y(t))-5*Y(t)

DE2 := diff(b(t), t) = 5*b(t)*Y(t)^(3/2)-5*Y(t)

 

Thank you for your help !

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