One-Step, Two-Step Review

Select the following basic rules used for solving one step equations?

• Whatever you do to one side of the equal sign, you must copy and do on the other side of the equal sign

• Negative signs can be ignored

• Always start on the left side, regardless of where the variable is

• Always do the inverse operation

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.

• Divide both sides by 11

• Multiply both sides by 11

• Add 11 to both sides

• Subtract 11 to both sides

The inverse operation of subtraction is ??????????

• addition

• subtraction

• multiplication

• division

The inverse operation of multiplication is ??????????

• addition

• subtraction

• multiplication

• division

The inverse operation of division is ??????????

• addition

• subtraction

• multiplication

• division

The FIRST step to solving one step equations is ????????

• Use the inverse on both sides to solve

• identify the variable

• find out the operation in the problem

What is the inverse operation that should be performed to solve this equation?

2y = 12

• addition

• subtraction

• multiplication

• division

Solve:

• -12
• -8
• 12
• 8

x - 10 = 20

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