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Algebra I Quiz Chapter 8 Solving Systems of Equations Name________________ Date April 6 , 2006 I. Solve by graphing the following lines on the graphs provided. Graph both lines and determine the point of intersection. 1. y = -1x + 5 2. X – 2y = 2 y = 1x - 3 3x + y = 6 3. y II. III. 1 x 2 and 3 1x – 3y = 6 Use substitution to solve each system of equations. Check answers. Show all work . Answers can be integers only, including 0. 4. y = 2x –7 5. Y = 4x x + y =11 x + y =5 Use elimination to solve each system of equation. Show all work and check answers. 6. 2x – y = 5 7. 3x – y = 11 8. y + x = 20 2x + y =3 x+y =5 y–x = 4 9. 3x +4y = 2 4x – 4y =12 10. 5x – 2y = -10 3x +6y = 66