A linear equation is an algebraic equation which is made up of two expressions. It is a polynomial of degree 1. It is a equation that can be written in the form ax + b = 0 , where a and b are real numbers and x is a variable. 
A linear equation is algebraic equation in which each term is either a constant of a product of constant and the single variable. In linear equation the highest degree term in the variable or variables is of the first degree. It is an equation of the form ax+by=c, where A is not equal to zero and b is not equal to zero. The graph of the linear equation is a straight line.
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