**Linear Equation in One Variable**

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A **linear equation in one variable **can be written in the form

Ax + B = C,

Where A, B, and C are real numbers, with A ≠ 0.

A linear equation is also called a first-degree equation since the greatest power on the variable is one. Some examples of equations that are not linear (that is, nonlinear) are

X^{2} + 3x = 5 , = -22, and = 6.