Systems Elimination Strategy

If you add these equations together which variable is going to eliminate?

• x

• y

• 4

Answer explanation

-4x + 4x = 0x = 0

To eliminate the y variable, . . .

• multiply the top equation by 1

• multiply the bottom equation by 3

• multiply the bottom equation by -3

• multiply the top equation by 4

Solve this system by elimination

• (0,2)

• no solution

• (2,0)

To solve this by elimination, which of the follow answer choices show an accurate strategy that will eliminate a variable.

• Multiply the top equation by -3 and then add the equations together.

• multiply the top equation by -3 and multiply the bottom equation by +5. Then, add the equations together.

• multiply the top equation by +9 and multiply the bottom equation by -4. Then, add the equations together.

• multiply the top equation by 9 and multiply the bottom equation by 4. Then, add the equations together.

Solve using Elimination Method:

4x+ 9y = 28

-4x -y = -28

• (-7,0)

• (6,0)

• (-6,0)

• (7,0)

• (6,7)

Solve using Elimination Method:

x - y = 11

2x + y = 19

• (10,-1)

• (-1,10)

• (3,-4)

• (6,7)

Solve for x.

(just the number)

Mathematical Equivalence

OFF

What is the solution?

• (1, -2)

• (-2, 1)

• (-4, 1)

• (2, 1)

Solve using Elimination Method:

4x + 9y = 28

-4x - y = -28

• (-7,0)

• (6,0)

• (-6,0)

• (7,0)

• (6,7)

what is the combined resulting equation?

• x + 11y = -31

• 11y = -31

• 11x = -31

• 4x + 11y = -31

• i need tutorials