Linear equation in one variable has:

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Only one variable with any power

Only one term with a variable

Only one variable with power 1

Only constant term

answer is C.

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Detailed Solution

Concept- In this case, the linear equation in one variable will first be defined. The alternatives will next be examined to see which meets the criteria for a linear equation in one variable. Then, we'll select just one.
A linear equation is one with an order of one at its highest. For lines that are existent in the coordinate system, the linear equations are defined. Since the maximum exponent of the variables in a linear equation, 1, is 1, it is also a first-degree equation.
Constants and variables are both used in linear equations. The equation for a linear relationship in one variable has the following form:

,
When x is a variable, b and an are both integers, and the equation only has one solution.
The linear equation only has one variable and has an exponent of 1 as its highest variable.
As a result, there is only one variable with a power of 1 in the linear equation with one variable.
As a result, choice (3) is the right response.

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