Solving Systems by Elimination Method

Select the coordinate point that is a solution to this system of equations using your method of choice.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

If elimination is the method used to solve this system of equations, what is the result of the first step?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Reorder the following Solve by elimination -katex latex="-3x-8y=20"-katex -katex latex="-5x+y=19"-katex

• Take the y=-4 you got and plug in to get x

• To eliminate, multiply the top equation by 3

• After plugging in y, you must solve the 2 step to get (-4,-4)

• Now you can zero out the x's

• You now have a one step, divide by -16

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve by elimination
-6x + 5y = 1
6x + 4y = -10

• (1,-1)

• (0,-1)

• (1,1)

• (-1,-1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the System using Elimination.
7x - y = -10
-7x + 5y = -6

• (-2, -4)

• (-2, -1)

• (-4, -1)

• (6, -8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

-8x - 7y = 10
-8x + 5y = 34
answers in (x,y)

• No Solution

• (-3, -10)

• (3, 2)

• (-3, 2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system:

x + 6y = 17

-x + 3y = -8

• (5, 2)

• (11, 1)

• (1, 11)

• no solution

Tags

CCSS.8.EE.C.8B

Solve using Elimination Method:

x - y = 11

2x + y = 19

• (10,-1)

• (-1,10)

• (3,-4)

• (6,7)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve using Elimination Method:

4x + 9y = 28

-4x - y = -28

• (-7,0)

• (6,0)

• (-6,0)

• (7,0)

• (6,7)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve by elimination:

7x - 9y = 29

7x + 2y = - 15

• (-4,-1)

• (-1.-4)

• (-1,4)

• (-1,6)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6