Elimination Systems Problems

A variable needs to be eliminated to solve the system of equations below. Choose the correct first step.

8x + 9y =  -24

-8x − y = 16

• Add to eliminate x

• Add to eliminate y

• Subtract to eliminate x

• Subtract to eliminate y

A variable needs to be eliminated to solve the system of equations below. Choose the correct first step.

4x + 9y =  1

4x − 7y = 11

• Add to eliminate x

• Add to eliminate y

• Subtract to eliminate x

• Subtract to eliminate y

A variable needs to be eliminated to solve the system of equations below. Choose the correct first step.

-8x + 6y =  12

-8x − 7y = 1

• Add to eliminate x

• Add to eliminate y

• Subtract to eliminate x

• Subtract to eliminate y

4x+8y=20

-4x+2y=-30

• (-7,1)

• (2,-5)

• (-2,5)

• (7,-1)

What is the solution to this system of equations?

• (2,-2)

• (1,2)

• ( 1/2 , 4 )

• (-2,2)

• (2, 4)

Solve by elimination 
  2x + 9y = -7
6x - 3y = 9 

• (-1, -1) 

• (2,-1)

• (1,1)

• (1,-1)

Solve the system by elimination.
  5x + 8y = -12
3x + 5y = -7

• (1, -10)

• No solution

• (-4, 1)

• (1, 10)

4x - 6y = -6

-2x -12y = -12

• (0,1)

• (1,0)

• (1,1)

• (2,1)

Would you add or subtract the equations to Eliminate a variable?

• ADD

• SUBTRACT