Solving one-step equations

x + 8 = 15

• 7

• 8

• 9

• 6

x + 13 = 25

• 15

• 12

• 10

• 11

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

m+13=21

• m=34
• m=8
• m=273
• m=6

Solve for x:

x + 19.46 = 245.3

• 264.76

• 12.6

• 50.7

• 225.84

20 = k + 16

Answer explanation

Solve an addition equation by subtracting or "adding the opposite".

What is the inverse operation of Addition?

• Addition

• Multiplication

• Division

• Subtraction