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solving equation

Posted 6 years ago
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I want solve equation group below, but you can see the result return a {}, but when i reduce the equation group like this , it can give a solution(Seeing in the image), why is this ? enter image description here

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Posted 6 years ago

I want solve equation group below, but you can see the result return a {}, but when i reduce the equation group like this , it can give a solution(Seeing in the image), why is this ? enter image description here

Posted 6 years ago

Please put your code in code blocks, not as images. Code blocks allow other members to copy and paste your code into Mathematica. You can find out how to do that, and many more useful things, by reading How to post.

Posted 6 years ago

you have two Delta_l1

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