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karenkardoukian
Variables are any letter that holds the value of a number. In most cases it is x or y. It can sometimes be sound next to another number. In this case you can find x next to 9. The variable here is x.

The variable in the given expression is x.

Determining the variable in an Expression

A variable is any letter or symbol that represents a number with an unknown value. In other words, a variable is a symbol for a number we don't know yet. A variable is also called the unknown.

From the given expression, 9x + 5

The letter which represents an unknown number is x.

Hence, the variable in the given expression is x.

Learn more on Variables here: https://brainly.com/question/11388301

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