Elimination by Addition and Subtraction

Two times a number added to another number is 25. Three times the first number minus the other number is 20. Find the numbers.

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x + 4y = 11

x – 6y = 11

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3x + 4y = 2

4x – 4y = 12

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2x – 3y = 9

–5x – 3y = 30

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If 2x+3y = 12 and 3x-2y=5 then

• x = 2, y = 3

• x = 2, y = -3

• x = 3, y = 2

• x = 3, y = -2

Solve for x and y.
y = 2/3x - 2
y = -x + 3

• (0,3)

• (0,-3)

• (3,0)

• (-3,0)

Solve the system of equation ; x - 2y=0 and 3x + 4y =20

• x=0

  y=5

• x=2

  y=1

• x=4

  y=2

• x=2

  y=5

What is the solution to this system of equations?

• (2,-2)

• (1,2)

• ( 1/2 , 4 )

• (-2,2)

• (2, 4)

Solve using Elimination Method:

x - y = 11

2x + y = 19

• (10,-1)

• (-1,10)

• (3,-4)

• (6,7)

Solve by elimination: 7x - 9y = 29 7x + 2y = - 15

• (-4,-1)

• (-1.-4)

• (-1,4)

• (-1,6)