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May 29th, 2019, 01:28 AM  #1 
Senior Member Joined: Dec 2015 From: somewhere Posts: 711 Thanks: 96  PDE solution explanation
Given equation : $\displaystyle z’_{x} a(x) +z’_{y} b(y)=c$ . Why the solution is found by dx/a(x)=dy/b(x)= c/dz ? 

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