Answer:
one because if there's no number like 2 or 3 in front of the variable, then it is one, but we don't normally write it if the coefficient of the variable is one.
Coefficient
Explanation:
The number in front of a variable is called the coefficient.
If you have 2x, then 2 would be coefficient of x.
If you have just x, then the coefficient of x is 1, we just don't write it.
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