title: Excel 2010 solver not working properly
body: <p>I'm trying to set up a system of equations which reference cells. I'm trying to get the left side of each equation to equal the right side, by changing certain variable cells.</p>
  
  <p>To cut to the chase, solver was returning that there was no solution. There is certainly a solution as this is an established set of equations.</p>
  
  <p>On looking into it, I removed constraints until I found the problem; excel solver was not attempting to use negative numbers for the inputs to solve the equation. I simplified to one constraint that could be solved by making one input -1 and leaving everything else the same, and it still returned no results, where every other constraint could be met fine.</p>
  
  <p>I'm not sure if there is a reason why excel is not trying to use negative numbers. I did not include an objective in the solver function because it was not necessary, but it still worked well with other constraints.</p>
  
  <p>I'm using excel 2010. Thanks</p>