2-2 Solving One Step Equations

The objective when solving an equation is to....

• isolate the variable.
• check the solution.
• guess and check.
• Combine Like Terms.

What does 'inverse' mean?

• same

• opposite

Which of the following has an equals sign?

• Equation

• Expression

To solve the equation
x + 5 = 8
 I would ....

• subtract 5 from x
• subtract 5 from both sides
• subtract 5 from one side and add 5 to the other
• add 5 to both sides

x + 8 = 15

• x = 23
• x = 7
• x = 120
• x = 15/8

13 + y = 20

• y = 13
• y = 33
• y = 7
• y = 20/13

n - 4 = 12

• n = 16
• n = 8
• n = 4/12
• n = 12/4

x - 10 = 20

• x = 20/10
• x = 20
• x = 10
• x = 30

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.

8 - n = 12

• x = 4
• x = 20
• x = - 4
• x = -20