Linear Equations Replacement of X and Y

If x + y = 17 and x - y = 1, then x = _____

• 9

• 8

• 5

• 4

If (0.8)x + 1.25 = 2x + 0.05, then x = ____

• 1

• 2

• 3

• 0

The number of variables in a simple equation is _____

• 3

• 2

• infinite

• 1

Among the following, an ordered pair that satisfies the equation -3x + 2y = 12 is ____

• (0, 6)

• (4, 0)

• (2, 0)

• (5, 0)

Solve for y.  y + 2 = 3x

• y = 2x + 3

• y= 3x +2

• y= 3x -2

• y= 6x

9x - 2y = -10

• y = -1/2x + 5

• y = 5x - 1/2

• y = 3/2x + 5

• y = 9/2x + 5

Solve for y.  3x + y = 12

• y = -3x +12

• x = y + 4

• x = y + 12

• y = 3x -12

Solve for y
5x + y = -10

• y = 5x + 10

• y = -5x - 10

Solve for y:
x + y = 4

• y = x + 4

• y = -x + 4

• x = -y + 4

• x= y - 4

• y = 2x - 6

• y = -2x + 6

• y = -10x + 30

• y = 10x - 30