Three Equations, Three Unknowns.

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SUMMARY

The discussion centers on solving a system of equations involving three variables: x, y, and z. The equations presented are \(\frac{5xy}{x+y} = 6\), \(\frac{7yz}{y+z} = 10\), and \(\frac{8zx}{z+x} = 15\). Participants noted that while traditional methods like cross-multiplying and elimination are viable, a more straightforward approach involves inverting the equations for easier manipulation. This insight highlights the importance of recognizing alternative methods in solving complex algebraic problems.

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Homework Statement



But somehow not that simple..

[tex]\frac{5xy}{x+y}[/tex] [tex]=6\left.[/tex]

[tex]\frac{7yz}{y+z}[/tex] [tex]=10\left.[/tex]

[tex]\frac{8zx}{z+x}[/tex] [tex]=15\left.[/tex]

Homework Equations





The Attempt at a Solution



Tried and failed.
 
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Looks like if you turned the equations upside down you have something easy to solve.

I think they want you to see that, although you could no doubt slog it out by cross multiplying and eliminating.
 

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