How do you decide whether substitution is the best method to solve a system in three variables?
Mathematics · High School · Tue Nov 03 2020
Answered on
The Substitution is best used when one of the equations is in terms of one of the variables such as y=2x+4, substitution is the best method to solve a system with three variables because equations can always be manipulated.
The first step in this method is to solve one of the equations for one variable. Once an expression for the variable is found, substitute or plug in the expression into the other equation where the original variable was to solve for the number value of the next table. The final step is to substitute the number value that was found in for its corresponding variable in the original equation.