SOLUTION: An equation that contains a variable is called what?

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Question 49019: An equation that contains a variable is called what?
Found 2 solutions by ikdeep, AnlytcPhil:
Answer by ikdeep(189) About Me  (Show Source):
You can put this solution on YOUR website!
linear equation
hope this will help
feel free to revert

Answer by AnlytcPhil(1116) About Me  (Show Source):
You can put this solution on YOUR website!
The preceding answer, "a linear equation" is incorrect.
The equation containing a variable does not have to be 
linear at all.  It could be linear, quadratic, cubic, 
exponential, logarithmic etc., etc. 

The correct answer is "OPEN SENTENCE"

Edwin