Question: Rearranging equations

Hi and thank you for looking.

I have recently begun advanced maths and need help with maple. Is it possible to input an algebra equation and have maple rearrange it to make it a different subject?

 

I am new to maple and maths again so any help much appreciated. 

 

Also can maple for example if I input 6 equations could it or is there a way to get maple to pick two like equations out of them.

 

Thanks again, Danny 

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