Modeling and Solving One Step Equations

Solve for x

• x = 4

• x = 1

• 2x = 4

• x = 2

Write the equation for the model. (white square=1 rectangle=x red square = -1)

• 7=x+3

• 7=x+(-3)

• 7=-x+3

• -7=x-3

In the equation
x + 7 = 12
7 is being added to the variable, x. How should you show your work to isolate the variable and solve the equation? 

• Subtract 7 from both sides. The solution is x = 5.

• Add 7 to both sides.
  The solution is x = 19.

• Multiply both sides by 7 The solution is x = 84.

Write the equation for the model.

• 10=2-x

• -10=-x+2

• -10=x-2

• -10=x+2

Write the equation for the model.

• 7=x+3

• 7=x+(-3)

• 7=-x+3

• -7=x-3

Solve for the missing variable:

• y = 7

• y = 6

• y = 1/6

• y = 8

What equation is modeled?

• 3 = 6

• 3x = 6

• x = 6

• 3 = 6x

The variable, k, is being divided by 11. How should you show your work to isolate the variable?

• Divide both sides by 11

• Multiply both sides by 11.

• Add 11 to both sides.

• Subtract 11 to both sides.

Solve for the missing variable:

• 21

• 61

• - 20

• 24

Solve for the missing variable:

• m = 5

• m = 1/5

• m = 25

• m = 55