Simultaneous Equations

Solve the system of equations:

-2x + y = 5

2x + 2y = 4

• x = 1,

  y =7

• x =7

  y = 1

• x = 2

  y = 9

• x = -1

  y = 3

Solve:

2x + 3y = 11

-2x + 4y = 10

• x = 1

  y = 3

• x = 3

  y = 1

• x = 3

  y = -1

• x = -1

  y = -3

Solve for x, and y)

5x + y = 9

10x − 7y = −18

• x = -4

  y = -1

• x = -1

  y = -4

• x = 4

  y = 1

• x = 1

  y = 4

Solve:

2x + 5y = 29

x + 5y = 22

• x = 7

  y = 3

• x = -7

  y = -3

• x = 7

  y = -3

• x = -7

  y = 3

Solve the system of equations:

-4x + 4y = 8

y = -2x - 10

• x = -4

  y = -2

• x = 12

  y = -34

• x = 4

  y = -18

• x = -2

  y = -6

Christian had brochures printed for a new business venture. Christian originally ordered 4 boxes of black-and-white brochures and 3 boxes of colour brochures, which cost a total of $134. After those ran out, Christian spent $120 on 3 boxes of black-and-white brochures and 3 boxes of colour brochures. Which simultaneous equations represent this situation?

• x+y=134

  x+y=120

• 3x+3y=134

  4x+3y=120

• 4x+3y=134

  3x+3y=120

• 7xy=134

  6xy=120