Upload
hisema01
View
331
Download
1
Embed Size (px)
Citation preview
Basic 2-Step Equations 10/1/13A lot like 1-step equations!
Goal: Get x by itself!
Need to “undo” what is done to x.
Always do the same thing to BOTH SIDES!
Use Order of Operations backwards:
Add/Subtract first
Multiply/Divide last
Combining Like Terms 10/7/13
What are “like terms”?
Must have the same variable, or have no variable.
Terms without a variable are called “constants.”
Remember: Variables are letters!
The number before the letter is called the coefficient.
Which are like terms?
2x – 6 + 9y + 2 – 6x + 2y
To combine like terms:
Circle, underline, or box the like terms
Minus signs go with the next #
Add their coefficients!
The Distributive Property 10/8/13The distributive property tells us how
to simplify expressions like: 2(x – 1)
We distribute the outside number to
both inside terms.
Like this:
Remember: “ab” means “a times b”
Simplifying Expressions 10/9/13
First, distribute to get rid of all
parentheses.
Then, combine like terms.
Multi-Step Equations 10/14/13
Multi-step equations have more than 2 steps.
To solve:
Simplify the side with the variables. Distribute
Combine Like Terms
Like terms may NOT cross the = sign!
Then, solve like a 1 or 2-step equation!