solving equations classwork

What is the inverse operation of subtraction?

• Subtraction
• Multiplication
• Division
• Addition

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.

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

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

What is the solution for x + 9 = 21

• 10
• 12
• 11
• 13

What is the inverse operation of division?

• Division
• Multiplication
• Addition
• Subtraction

• x = 20
• x = 7
• x = 10
• x = 3

m+13=21

• m=34
• m=8
• m=273
• m=6

5.    6b = 30

• x = 36
• x = 24
• x = 180
• x = 5

Solve the equation
3x = 27. 

• x = 24
• x = 81
• x = 9

• 100

• 120

• 4

• 5