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A(n)___
is a letter used as a placeholder for an unknown value.

User Gogutz
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2 Answers

5 votes
variable
variables are any letters you use, such as in 3x, x is your variable. It holds an unknown value
User ThatChris
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6 votes
The answer is a variable! An example of a variable is:
5x +5 =35
X= 6
User Pavel Sem
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