title: In Maxima, how can I solve this equation?
body: <p>In Maxima, how can I solve this equation? And actually I have 24 unknown value with lots of this kind of equation. How I can use Maxima to solve?</p>
  
  <p>to know the unknown value: <code>a, b, c, d</code></p>
  
  <pre><code>eq:[a*c=8,a*d=10,b*c=12,b*d=15,a+b=5,c+d=9];
  solve(eq,[a,b,c,d]);
  </code></pre>