Definition Of First Degree Equations

The equations in which the highest exponent is 1 are called the First Degree Equations.

More About First Degree Equations

All linear equations are first degree equations.
Equation of a straight line is a first degree equation.

Video Examples: Solving First Degree Equations
 

Example of First Degree Equations

Consider the equation 3x + 5 = 6.
The highest exponent of the variables in this equation is 1.
So, 3x + 5 = 6 is a first degree equation.

Solved Example on First Degree Equations

Ques: Identify the first degree equation from the following.

Choices:

A. 8x - y = 3
B. 5x + 4x² = 7x
C. 7x³ - 8x² + 9x + 3 = 0
D. x² + 2x + 1 = 0
Correct Answer: A

Solution:

Step 1: The equations in which the highest exponent is 1 are called the first degree equations.
Step 2: Here, only 8x - y = 3 has 1 as its highest exponent.
Step 3: So, 8x - y = 3 represent a first degree equation.

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