1. Solve the given system by elimination: 2) 4x + 2y = -2 2x – y = -3
Warm up
Solve the given system by substitution:
y = 2x + 2
4x – y = -6
Solve the given system by elimination:
2) 4x + 2y = -2
2x – y = -3

2. Questions over hw?

3. SUBSTITUTION ELIMINATION GRAPHING Summary of Methods
Substitution: one of the variables be isolated on one side of the equation or easy to isolate when one of the variables has a coefficient of 1 or -1.
Elimination: a variable appears in different equations with coefficients that are opposites or each variable has a coefficient.
Graphing: when the equations are in y = mx+b, or y can easily be solved for with a whole number as the y-intercept.
SUBSTITUTION
ELIMINATION
GRAPHING

4. White Board Review

5. Graphing

6. Substitution

7. Elimination

8. Best Method
7. y = 4x – 3
5x – 2y = 6
8. 4x – 5y = 13
2x + 5y = 5

9. Best Method

10. Best Method
12. x + y = 4
2x + 3y = 7

11. Homework
Quiz on Friday!
Quiz Review