Discuss ide437's answer to: How do you solve the equation 9-c=-13?

ide437
ide437 Answered:

You may add 13 to the first side, but it is impossible to add it to the second side.  The fact that c is not a number, but a letter automatically eliminates

it from being in a math problem. 

 

lol

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PGroot
PGroot Thinks this answer is Not Helpful:

This is algebra.
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