practice solving by elimination

4x +  8y = 20

-4x + 2y = -30

Which variable will be eliminated first?

• The  x's

• The  y's

• The  z's

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

-4x-2y=-12 4x+8y=-24

Solve the system using ELIMINATION.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system using ELIMINATION.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve by elimination:
-x+2y=17

2x+2y=-10

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve by elimination:
7x+y=-9

-3x-y=5

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

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

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which variable will be eliminated?

• x

• y

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

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

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6