Solving One-Step Equations

Why Learn This?

You can use known information to find unknown information.

Words you need to know

Inverse Operations- operation that undo each other to get the variable alone:

Addition can undo subtraction and Subtraction can undo Addition

Multiplication can undo Division and Division can undo Multiplication

Solving Equation by Adding

Ex.   q - 16 = 40                                                          h - 37 = -42

Solving Equations By Subtracting

ex.  Your friend's scooter cost $213 more than his bike. His scooter cost $288. How much is your friends bike?

Ex.  288 = 213 + s                                                                   x + 34 = 212      

Solving Equations by Multiplying

Ex.   t  / -45 = -5                                                                   x / 4 = -10

Solving Equations by Dividing

Ex.   4p = 22.68                                                                        0.2x = 4