Solving systems of linear equations with substitution

The  exercise appears under the 8th Grade Math Mission. This exercise has practice with solving systems of equations that are set up for substitution.

Types of Problems
There is one type of problem in this exercise:


 * 1) Solve system with substitution: This problem presents two equations one of which is already ready for substitution. The student is expected to use substitution and solve the system. The answer is provided as an x and a y-coordinate.Soews1.png

Strategies
Knowledge of the substitution method of solving equations will help to perform this exercise accurately and efficiently.
 * 1) To solve by substitution, replace one instance of the variable with an equation that it is equal to.

Real-life applications

 * 1) Applications include supply and demand lines form business and various other situations where there is information gained from different resources.