title: How to find math variables in dart equation
body: <p>I need to know how to find an unknown variable in dart to solve a math equation. B is the unknown variable and the known is the known variable.</p>
  
  <pre><code>double B = 0.0;
  double known = 1423.0;
  known = B -
      ((B * 0.105 + B * 0.005 + B * 0.055) +
          ((B - (B * 0.105 + B * 0.005 + B * 0.055)) * 0.16));
  </code></pre>