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Re: What is causing this error message?


Equations must me entered with "==", not with "=".

You are trying to Set ("=") an expression on the left whose Head is Plus.
Thus you are trying to redefine Plus. Mathematica won't normally let you do
that.

David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/

From: Bookreader [mailto:bookreader127 at yahoo.com]
To: mathgroup at smc.vnet.net


	NSolve[{x^3y + xy - 10 = 0, xy^2 - xy + 6 = 0}, {x, y}]

	Set::write: Tag Plus in -10 + x y + x^3  y is Protected. More?

	Please tell me how to correct this.

	Thanks.





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