Learn how to solve a system of equations by substitution

The video tutorial demonstrates how to solve a system of equations using the substitution method. It begins by explaining the concept of substitution, where a value is substituted for a variable. The tutorial then walks through the process of substituting the expression for one variable into another equation, solving for the variable D, and finally using the value of D to find the value of C. The solution set is determined as D = 2 and C = -6.

What is the first step in solving the system of equations by substitution?

How do you substitute a variable in an equation?

What expression is used to substitute for variable C?

What is the value of D after solving the equation?

What is the final solution set for the system of equations?