Question 186564
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Number of 3-legged tables: <i>x</i>


Number of 4-legged tables: <i>y</i>


Number of tables:  <i>x</i> + <i>y</i> = 36 &#8594; <i>x</i>  = 36 - <i>y</i>


Number of legs:  3<i>x</i> + 4<i>y</i> = 124


Substitute:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \  3(36 - y) + 4y = 124]


Solve for <i>y</i> to get the number of 4-legged tables.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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