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Substitution. Lesson 6-2: Substitution SOL A.4e. Objectives. Solve systems of equations by using substitution. Solve real-world problems involving systems of equations by using substitution. . Vocabulary!. Substitution:
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Substitution Lesson 6-2: Substitution SOL A.4e
Objectives • Solve systems of equations by using substitution. • Solve real-world problems involving systems of equations by using substitution.
Vocabulary! • Substitution: • Use algebraic methods to find an exact solution of a system of equations.
Solving by Substitution *If a variable is not isolated in one of the equations in a system, solve an equation for a variable first. Then you can use substitution to solve the system. *If both equations are in the form y = mx + b, they can simply be set equal to each other and then solved for x. The solution for x can then be used to find the value of y.
Homework! • Page 345 (2 – 22 even).