Question

what is variable is 2x.
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Answer 1

In 2x, 2 is constant and x is variable but together 3x is a variable. (iv) If 2 is a constant and x is a variable, then 2 + x, 2 - x, 2/x, 2x, x/2, etc., are also variables.

Answer 2

Given,

The number 2x.

To Find,

The variable part in the total number 2x.

Solution,

To understand it in a better way we need to know what the variable and what the constant is.

The value of a variable is determined by the equation. But on the opposite side, a constant's value does not vary over time. Basically all numbers like 2,3,4,5, etc are constant but any alphabets like x,y, a,b,p,q, etc are variable.

Here in 2x, 2 is constant and x is variable but the total 2x is not a variable.

Hence, The variable in 2x , is x.