System of Equations Elimination

Solve the following system by elimination:

-2x + 7y = 22

5x - 7y = 8

• (-3, 16/7)

• (-10, -1)

• (10, 6)

• none of the other choices

Solve the following system by elimination:

4x + 2y = 18

-4x - y = -21

The x-value of the solution is ---.

(Just type in the number)

Solve the following system by elimination:

-2x + 4y = -22

-2x - 3y = -1

• (9, 3)

• (9, -3)

• (5, -3)

• (5, 3)

• none of the other choices

Solve the following system by elimination:

-7x - 4y = 19

-x + 8y = -23

• (-3, -10)

• (-3, 1)

• (1, -3)

• (-1, -3)

• no solution

Say you wanted to eliminate x from the system shown. How would you do it?

• Add the equations without doing any multiplication.

• Multiply the first equation by 2 and the second equation by 3, then add the equations.

• Multiply the first equation by negative 2 and the second equation by 3, then add the equations.

• Multiply the first equation by 3 and the second equation by negative 2, then add the equations.

Solve using Elimination Method:

x - y = 11

2x + y = 19

• (10,-1)

• (-1,10)

• (3,-4)

• (6,7)

Find the solution to the following system of equations using the elimination method: 2x + 3y - z = 5 3x - 2y + 4z = 7 4x + y + 2z = 3

• x = 2, y = -1, z = 1

• x = -2, y = 1, z = -1

• x = 1, y = 2, z = -1

• x = 3, y = -2, z = 2

Solve the system of equations using the elimination method:

3x + 2y - z = 6

2x - y + 3z = 4

4x + 3y + 2z = 9

• x = 4/5, y = 2, z = -3/5

• x = 0, y = 0, z = 0

• x = -2/3, y = 1/2, z = 1/4

• x = 1, y = 3, z = 2

Solve the system of equations using the elimination method: 3x + 2y - z = 6 2x - y + 3z = 4 4x + 3y + 2z = 9

• x = 4/5, y = 2, z = -3/5

• x = 0, y = 0, z = 0

• x = -2/3, y = 1/2, z = 1/4

• x = 1, y = 3, z = 2

4x+ 9y = 28

-4x -y = -28

• (-7,0)

• (6,0)

• (-6,0)

• (7,0)

• (6,7)