one step equations

one step equations

Opposite operations:

- Addition and subtraction are opposites

o  If I give you $5 and then take away $5, the amount of money you have stays the same

-  Multiplication and division are opposites

o  If I double your pay and then take half back you make what you started with

Solving Equations

-  Locate the variable

-  Determine what is being done to the variable

- Do the opposite to both sides to keep the equation balanced

Example 1:    x + 5 = 13

Example 2:   14 = x – 5

Example 3:  3x = -12

Example 4:  $-4=\frac{x}{3}$  

Multiple Choice

y - 33 = 147

• y = 114
• y = 177
• y = 180
• Answer not Given

Multiple Choice

Solve the equation:
20.5 = x + 4

• 16.5
• 16.05
• 24.5
• 24.05

Multiple Choice

Solve the equation
3x = 27. 

• x = 24
• x = 81
• x = 9