Bad Solve Variable

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@DS_10024912 wrote:

What am I doing wrong?

 

 

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Its not so easy to say just by looking at the picrture and without seeing the worksheet itself.
It sure would be better to attach the worksheet rather than just posting a picture.

My best two guesses:

1) Before the region with the symbolic solve you assigned a value to a variable V.rms

Solution:  Clear the variable V.rms in fromt of the region by typing     clear.sym(V.rms)

2) You ran into Primes infamous auto-label bug.

Solution: Check if both occurrences of V.rms are labelled the same. If not, manually label both the same, either both "Variable" or both "-" (which means "automatic")

Both scenarios would throw the error shown in your pic.