Solving One-Step Equations

What is the inverse operation of subtraction? (a)  

• Subtraction
• Multiplication
• Division
• Addition

What is the inverse operation of division? (a)  

• Division
• Multiplication
• Addition
• Subtraction

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.

Tags

CCSS.6.EE.B.5

CCSS.6.EE.B.7

The objective when solving an equation is to (a)  

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

What is the solution for x + 9 = 21

Mathematical Equivalence

ON

• x = 20
• x = 7
• x = 10
• x = 3

Tags

CCSS.6.EE.A.2

CCSS.6.EE.B.5

CCSS.6.EE.B.6

m+13=21 (a)  

• m=34
• m=8
• m=273
• m=6

k+8=15 (a)  

• k=23
• k=10
• k=7
• k=11

5.    6b = 30 (a)  

• x = 36
• x = 24
• x = 180
• x = 5

Solve the equation3x = 27.  (a)  

• x = 24
• x = 81
• x = 9