Stuck on Real Gas Problem Derivatives?

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The discussion revolves around solving derivatives related to the critical volume (Vm (crit)) in a real gas problem. The original poster is struggling to isolate Vm (crit) after setting the derivatives equal to zero. A suggested approach involves rearranging the equations by moving terms and then dividing them. This method was noted as a helpful reminder for the poster. The conversation emphasizes the importance of algebraic manipulation in solving complex equations.
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Homework Statement



The task is the following:

DqyYiM7.png


Homework Equations

The Attempt at a Solution



I calculated the derivatives for Vm (crit) and set them = 0, but somehow I can't solve the equation to obtain Vm (crit) on one side alone.

This is how far i managed to do it:

jyTvnaB.png


Can someone help me?
 
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One approach: For each equation move the second term on the left to the right side. Then divide the two equations.
 
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Wow, thanks!

I totally forgot that method
 
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