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A linear equation is a mathematical equation that represents a straight line on a graph. It has the general form:
ax + b = y
Where:
 ‘a’ is the slope or the coefficient of the variable ‘x’
 ‘b’ is the yintercept or the point where the line crosses the yaxis
 ‘x’ and ‘y’ are the variables
Some examples of linear equations include:
 y = 2x + 3
 4x – 5y = 10
 x + y = 7
Linear equations have a constant rate of change, meaning the slope is the same throughout the entire line. They are the simplest type of equation that represents a straightline relationship between two variables. Linear equations are fundamental in algebra, geometry, and many other areas of mathematics.