Solving One Variable Addition and Subtraction

What is the inverse operation of subtraction?

• addition

• subtraction

• multiplication

• division

What is the inverse of addition?

• multiplication

• division

• subtraction

• addition

6x - 5 + 7x = 34

x = ?

(Just type the number)

-15 + 3x - 7x = -43

x = ?

(Just type the number)

What is the first step to solve the equation?

4h + 3 - 2h = 15

• Distribute

• Combine Like Terms

• Collect Variables to One Side

• Use Subtraction Property of Equality

What is the first step to solve this equation?
3x - 5 = 7

• Add 5 to both sides of the equation

• Add 3x to both sides of the equation

• Subtract 5 from both sides of the equation

• Subtract 7 from both sides of the equation

20 = 2 - a

a = ?

(Just type the number)

Solve: 13 = -11 - 4x

x = ?

(Just type the number)

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.

Solve for x in the following equation:

20.5 = x + 4

• 16.5

• 16.05

• 24.5

• 24.05