Part 1: Explain, in complete sentences, how you would use the elimination method to solve the following system of equations. (3 points)

Part 2: Provide the solution to the system. (1 point)

2x + 9y = 4
3x + 7y = –7

Question

Part 1: Explain, in complete sentences, how you would use the elimination method to solve the following system of equations. (3 points) 

Part 2: Provide the solution to the system. (1 point) 

2x + 9y = 4 
3x + 7y = –7

anonymous · Answer

http://www.youtube.com/watch?v=0P0SCQf-hWQ

anonymous · Answer

check that out!

campbell_st · Answer

multiply equation (1) by 3    (6x + 27y = 12)
multiply equation (2) by 2    (6x +14y = -14)

the subtract  (1) - (2)            (13y = 26)
divide both sides by 13         (y = 2)

substitute into (1)                   (3x + 18 = 4)
subtract 18 from both sides   (3x = -14)
divde both sides by 3              (x = -14/3)

campbell_st · Answer

oops error with finding x

2x + 18 = 4

2x = -14

x = -7