Olivia McGleish wrote:
When I attempt to recalculate using ctrl+F9 there is no answer obtained and no red (I guess which is errors) writing appears.
I have autocalculation turned on and I am using version 15.0 (15.0.0.436).
Thats strange. I glanced at the release notes of the current MC15 release and did not spot any fixed bug which would relate to that effect. Nevertheless it would be worth a try to update to the current MC15 [M030].
Other ideas: contact PTC support OR reinstall Mathcad.
As you can see in the pic below your sheet evaluates as it should for me,
You can obtain the solution by basic matrix operation, too, as shown in the pic.
