Solving Linear Equations by Elimination

 4x + 8y =  20
-4x + 2y = -30

• (-7,1)

• (2,-5)

• (-2,5)

• (7,-1)

4x +  8y = 20
-4x + 2y = -30
Which variable will be eliminated?

• The  x

• The  y

• The  z

• The unknown

Solve using elimination. 
 4x + 8y = 20
-4x + 2y = -30

• (-7,1)

• (2,-5)

• (-2,5)

• (7,-1)

• (-2,2)

• (2,-2)

• (-2,-2)

• (-2, 1/2)

-5x + 5y = -5

x - 5y = -7

• (3, 2)

• (-1, 3)

• Infinite solutions

• No solutions

2x + 4y = 0

-5x - 4y = 18

• (6, -6)

• (-6, 3)

• Infinite solutions

• No solutions

• -1

• 6

• 1

• -6

Which of the following is the correct solution to the system of linear equations?

• (6, 10/3)

• (6,5)

• (4,5)

• (4,-5)

• (1,2)

• (-1,2)

• (1,-2)

• (-1,-2)

• The x-variable

• The y-variable

• Neither variable will be eliminated.