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Jacobian transformation

1. The problem statement, all variables and given/known data

Screenshot2012-05-28at53517AM.png


what routine algebra are they talking about. I don't see how they got

x = u/3 - v/3

or

y = 2u/3 +v/3
 

tiny-tim

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substitute y = u - x into v, and solve for x
 
thanks I got it. it's amazing how amazing you are.
 

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