Expanding and Simplifying Varley Bridge Equations

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The discussion revolves around simplifying the Varley Bridge equations by manipulating brackets in the first equation to derive the second equation. A user expresses difficulty in understanding the process and seeks assistance. Another participant suggests focusing on eliminating the Rc + Rl bracket while retaining the first term for the final result. They recommend opening the second term, incorporating Rl, and simplifying the expression. Sharing progress on the calculations could lead to more targeted guidance.
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Hi this question is asking to show how multiplying the brackets of the first equation can result into the second equation, I think I have been looking at it for far to long as I can not seem to work it out.

any pointers would be much appreciated.
 

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It seems simple. You only need to get rid of the Rc + Rl bracket, leaving the first resulting term alone (keep it for the final result), open up the second term, then bring Rl across and incorporate it into that second term result, simplify it and there you are.

If you show your progress so far I can be more specific perhaps.
 
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