Mr. Condela - Review 8th : System of Equations (Elimination)

-4x - 2y = -12

4x + 8y = -24

• (6,-6)

• (-6,6)

• (6,6)

• (-6,-6)

-2x - 4y = 22

10x + 4y = 18

• (5, -8)

• (-5, -8)

• (-8, 5)

• (-8, -5)

• (5,8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

2x + 5y = 5

-5x - 5y = -5

• (0, 1)

• (0, -1)

• (1, 0)

• (-1, 0)

• (-1, -1)

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

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

2x + 2y = -2

3x - 2y = 12

• you cannot solve this using eliminiation

• cross out the 2x and 3x

• cross out the 2y and -2y

• change to slope intercept form and graph

solve the system of equation using elimination

x - 2y = -19

5x + 2y = 1

• (3, -8)

• blah blah blah

• (1, 0)

• (-3,8)

Solve using elimination.

4x + 8y = 20

-4x + 2y = -30

• (-7,1)

• (2,-5)

• (-2,5)

• (7,-1)

-6x + 5y = 1

6x + 4y = -10

• (1,1)

• (-1,-1)

• (0, 1)

• who cares???

Solve by elimination:

4x + 9y = 28

-4x - y = -28

• (-7,0)

• (6,0)

• (-6,0)

• (7,0)

Solve by elimination:

7x + y = -9

-3x - y = 5

• No solution

• (1,8)

• (-2,-3)

• (-1,-2)