Classical Optimization TechniquesDirect substitution method is used for

The direct substitution method is used for solving equations or systems of equations. Here are the steps:

1. Identify the equation or system of equations to be solved.

2. If you are dealing with a system of equations, try to express one variable in terms of the other variables.

3. Substitute the expression from step 2 into the other equation(s). This will give you a new equation that only contains one variable.

4. Solve the new equation for the variable.

5. Substitute the solution from step 4 back into the original equation(s) to find the values of the other variables.

6. Check your solution by substituting the values of the variables back into the original equation(s). If the left-hand side equals the right-hand side, then your solution is correct.