Question

When is it best to solve a system of equations using substitution?​

Answer 1

Answer Below

Explanation:

It is best to use substitution if one of the variables is isolated or has a coefficient of 1 or -1.

Answer 2

It is best to solve a system of equations using substitution when one of the equations isolates one of the variables, or when the coefficient of one of the variables is 1 or -1.

Explanation:

This makes it easier to substitute one variable for the other, allowing you to solve for the remaining variable. It is also a good idea to check the solution back in the original equations just to make sure it is a valid solution