Explanation:

Substitution Method:

It is a measurement technique in which the quantity is measured by direct comparison on an indicating device by replacing the measurable quantity with another which produces the same effect on the indicating device.
The substitution method is the algebraic method to solve simultaneous linear equations. As the word says, in this method, the value of one variable from one equation is substituted in the other equation. In this way, a pair of the linear equation gets transformed into one linear equation with only one variable, which can then easily be solved. 

Substitution Method Steps:
For instance, the system of two equations with two unknown values, the solution can be obtained by using the below steps. Here, the list of steps is provided to solve the linear equation. They are

• Simplify the given equation by expanding the parenthesis
• Solve one of the equations for either x or y
• Substitute the step 2 solution in the other equation
• Now solve the new equation obtained using elementary arithmetic operations
• Finally, solve the equation to find the value of the second variable