Lets say x y 3 and x - y 1. The substitution method is the algebraic method to solve simultaneous linear equations. Then substitute that expression for y in the other linear equation.
As the word says in this method the value of one variable from one equation is substituted in the other equation.
Solve for the second variable. Examples of How to Solve Systems of Equations by Substitution Method Example 1. To begin the easiest way look for a variable with a coefficient of 1 and solve for it. Youll get an equation in x.