Elimination Error Analysis System of Equations

Find the solution using the elimination method. (Write your answer as an ordered pair, i.e. (1,1)

Find the solution using the elimination method. (Write your answer as an ordered pair, i.e. (1,1)

 4x + 8y = 20
-4x + 2y = -30

• (-7,1)

• (2,-5)

• (-2,5)

• (7,-1)

Solve by elimination:
9x-4y=7

x-4y=-17

• (-1,5)

• (-7,5)

• (7,5)

• (3,5)

what would the top equation become when you multiply everything by -1?

• 2x - 6y = 20

• -2x - 6y = -20

• -2x + 6y = 20

• -2x + 6y = -20

To use the elimination method, both equations need to be in...

• slope intercept form

• standard form

Solve for x.

(just the number)

Mathematical Equivalence

OFF

what would the top equation become when you multiply everything by -1?

• 2x - 6y = 20

• -2x - 6y = -20

• -2x + 6y = 20

• -2x + 6y = -20

what number should you multiply the top equation to eliminate variable x by adding:

• 5

• -1

• 2

• -2

-4x - 6y = 6
4x + 6y = -4

• no solution

• (2,0)

• (-4,0)

• (0,0)