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What is the variable in this algebraic expression 8+6, 4d-2, 7r-15=6, 11+14=25

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For this case we have that by definition, a variable is a symbol that can be replaced or that takes a numerical value in an equation or expression, mathematical in general.

Then we have the following options:

A)
8 + 6

It is a sum of two real numbers. There are no variables.

B)
4d-2

In this case the variable is "d"

C)
7r-15 = 6

In this equation, the variable is represented by "r"

D)
11 + 14 = 25

It is a sum of two real numbers. There are no variables.

Answer:

A) There are no variables

B) "d"

C) "r"

D) There are no variables

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