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Download 8-3 Solve Systems using Elimination
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SWBAT: Solve systems of linear equations by elimination Lesson 8-3 Do Now: 1. Graph the following system of equations: 2. Solve the following system using substitution: 1 SWBAT: Solve systems of linear equations by elimination Lesson 8-3 Solving Systems of Linear Equations by Elimination Step 1: Write the system so that like terms are aligned. Step 2: Eliminate one of the variables and solve for the other variable. Step 3: Substitute the value of the variable into one of the original equations and solve for the other variable. Step 4: Write the solution as an ordered pair (x, y ) , and check. Solve and check each system of equations. 1) 2) 4 x y 1 2 x y 5 x 3 y 15 2 x 3 y 6 Quick check for understanding: 3) 4) 3x y 26 2 x y 19 x 3 y 7 x 2 y 8 2 SWBAT: Solve systems of linear equations by elimination Lesson 8-3 Solving System of linear equations using multiplication 5) 2 x 2 y 4 3 x 2 y 7 6) 6 x 5 y 4 6 x 7 y 20 3 SWBAT: Solve systems of linear equations by elimination Lesson 8-3 7) 6 x 4 y 8 4 x 2 y 3 8) 5 x 2 y 1 3 x 7 y 11 4 SWBAT: Solve systems of linear equations by elimination Lesson 8-3 LESSON PRACTICE 1) 2) 3x y 14 x y 2 4 x 4 y 22 2 x y 10 3) 3 x y 16 2 x y 11 4) 5 x y 6 5 x 2 y 3 5 SWBAT: Solve systems of linear equations by elimination Lesson 8-3 5) 6) x y 13 x y 5 x 2 y 8 x 2 y 4 7) 8) 8 x 5 y 9 2 x 5 y 4 x 6 y 14 x 6 y 10 6
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