What are linear equations?

Linear equations are mathematical statements that show the relationship between variables using only addition, subtraction, multiplication, or division, and the variables are only raised to the first power. Typically, a linear equation in one variable looks like ax + b = 0, where 'a' and 'b' are constants. In two variables, such as x and y, the standard form is ax + by = c. Linear equations graph as straight lines and are fundamental concepts in algebra, used to solve real-world problems involving unknown quantities.