g8 elimination

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

• The  x
• The  y
• The  z
• The unknown

Solve by elimination:
4x+4y=4

3x+4y=10

• (7,-6)
• (-6,7)
• (6,7)
• (7,6)

Solve by elimination:

3x+7y=23

-3x-7y=-17

• No solution

• (0, 3)

• (-3,3)

• (3,3)

What would be the first step in finding the solution with elimination?

4x + 3y = 1

x - 3y = -11

• cross out the 3y and -3y

• cross out the 4x and x

• change all the signs of the second equation

• add 1 and -11

A ________________ is a set of two or more equations that have the same variables.

• solution of a system
• elimination method
• system of equations
• table

Identify the solution to this system of equations.

• (4, -1)
• (-1, 4)
• (-4, 1)
• (-4, -1)

Which variable will be eliminated?

• x

• y

Solve the system of Equation (x,y)
x + 4y = –3
 x + 7y = –12 

• (-3,9)
• (9,-3)
• (3,9)
• (9,3)

Which of the following represents a system of equations?

• 2x + 3y = 6 and 4x - 3y = 12

• y = -x + 5

• x + y = 10

• y = 2x + 3

Solve by elimination:

5x + 2y = 20

3x - 2y = 4

• (4, 0)

• (2, 5)

• (5, 2)

• (0, 10)